1491178260768 has 96 divisors (see below), whose sum is σ = 4473784304640. Its totient is φ = 426027168000.

The previous prime is 1491178260763. The next prime is 1491178260769. The reversal of 1491178260768 is 8670628711941.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×1491178260768² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1491178260763) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14565663 + ... + 14667681.

It is an arithmetic number, because the mean of its divisors is an integer number (46601919840).

Almost surely, 2^{1491178260768} is an apocalyptic number.

It is an amenable number.

1491178260768 is an abundant number, since it is smaller than the sum of its proper divisors (2982606043872).

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

1491178260768 is a wasteful number, since it uses less digits than its factorization.

1491178260768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123790 (or 123782 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 60.

The spelling of 1491178260768 in words is "one trillion, four hundred ninety-one billion, one hundred seventy-eight million, two hundred sixty thousand, seven hundred sixty-eight".