1640385526080 has 896 divisors, whose sum is σ = 6683049676800. Its totient is φ = 331850317824.

The previous prime is 1640385526051. The next prime is 1640385526111. The reversal of 1640385526080 is 806255830461.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 301705122 + ... + 301710558.

It is an arithmetic number, because the mean of its divisors is an integer number (7458760800).

Almost surely, 2^{1640385526080} is an apocalyptic number.

1640385526080 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 1640385526080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3341524838400).

1640385526080 is an abundant number, since it is smaller than the sum of its proper divisors (5042664150720).

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

1640385526080 is a wasteful number, since it uses less digits than its factorization.

1640385526080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5639 (or 5629 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 48.

The spelling of 1640385526080 in words is "one trillion, six hundred forty billion, three hundred eighty-five million, five hundred twenty-six thousand, eighty".