77907495481 has 16 divisors (see below), whose sum is σ = 82648115200. Its totient is φ = 73231549200.

The previous prime is 77907495451. The next prime is 77907495509. The reversal of 77907495481 is 18459470977.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77907495481 is a prime.

It is a super-2 number, since 2×77907495481² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77907495451) 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, 4827616 + ... + 4843726.

It is an arithmetic number, because the mean of its divisors is an integer number (5165507200).

Almost surely, 2^77907495481 is an apocalyptic number.

It is an amenable number.

77907495481 is a deficient number, since it is larger than the sum of its proper divisors (4740619719).

77907495481 is a wasteful number, since it uses less digits than its factorization.

77907495481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18100.

The product of its (nonzero) digits is 17781120, while the sum is 61.

The spelling of 77907495481 in words is "seventy-seven billion, nine hundred seven million, four hundred ninety-five thousand, four hundred eighty-one".