1491767746560 has 2016 divisors, whose sum is σ = 6717282691392. Its totient is φ = 309586821120.

The previous prime is 1491767746493. The next prime is 1491767746591. The reversal of 1491767746560 is 656477671941.

1491767746560 is a `hidden beast` number, since 1 + 4 + 9 + 1 + 7 + 67 + 7 + 4 + 6 + 560 = 666.

It is a tau number, because it is divible by the number of its divisors (2016).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 24455208930 + ... + 24455208990.

It is an arithmetic number, because the mean of its divisors is an integer number (3331985462).

Almost surely, 2^{1491767746560} is an apocalyptic number.

1491767746560 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 1491767746560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3358641345696).

1491767746560 is an abundant number, since it is smaller than the sum of its proper divisors (5225514944832).

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

1491767746560 is an frugal number, since it uses more digits than its factorization.

1491767746560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136 (or 91 counting only the distinct ones).

The product of its (nonzero) digits is 53343360, while the sum is 63.

The spelling of 1491767746560 in words is "one trillion, four hundred ninety-one billion, seven hundred sixty-seven million, seven hundred forty-six thousand, five hundred sixty".