77738604576531 has 8 divisors (see below), whose sum is σ = 103654072207824. Its totient is φ = 51824436664800.

The previous prime is 77738604576469. The next prime is 77738604576539. The reversal of 77738604576531 is 13567540683777.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77738604576531 - 2⁶ = 77738604576467 is a prime.

It is a super-2 number, since 2×77738604576531² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77738604576539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 324790320 + ... + 325029581.

It is an arithmetic number, because the mean of its divisors is an integer number (12956759025978).

Almost surely, 2^{77738604576531} is an apocalyptic number.

77738604576531 is a deficient number, since it is larger than the sum of its proper divisors (25915467631293).

77738604576531 is a wasteful number, since it uses less digits than its factorization.

77738604576531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649859781.

The product of its (nonzero) digits is 622339200, while the sum is 69.

The spelling of 77738604576531 in words is "seventy-seven trillion, seven hundred thirty-eight billion, six hundred four million, five hundred seventy-six thousand, five hundred thirty-one".