1640756494080 has 1152 divisors, whose sum is σ = 6531433574400. Its totient is φ = 386629632000.

The previous prime is 1640756494049. The next prime is 1640756494081. The reversal of 1640756494080 is 804946570461.

1640756494080 is a `hidden beast` number, since 1 + 6 + 4 + 0 + 75 + 6 + 494 + 0 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (1152).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640756494081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4091661880 + ... + 4091662280.

It is an arithmetic number, because the mean of its divisors is an integer number (5669647200).

Almost surely, 2^{1640756494080} is an apocalyptic number.

1640756494080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1640756494080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3265716787200).

1640756494080 is an abundant number, since it is smaller than the sum of its proper divisors (4890677080320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1640756494080 is a wasteful number, since it uses less digits than its factorization.

1640756494080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718 (or 698 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 54.

The spelling of 1640756494080 in words is "one trillion, six hundred forty billion, seven hundred fifty-six million, four hundred ninety-four thousand, eighty".