775400692728 has 32 divisors (see below), whose sum is σ = 1943128252800. Its totient is φ = 257850028128.

The previous prime is 775400692721. The next prime is 775400692739. The reversal of 775400692728 is 827296004577.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (775400692721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38544076 + ... + 38564187.

It is an arithmetic number, because the mean of its divisors is an integer number (60722757900).

Almost surely, 2^775400692728 is an apocalyptic number.

It is an amenable number.

775400692728 is an abundant number, since it is smaller than the sum of its proper divisors (1167727560072).

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

775400692728 is a wasteful number, since it uses less digits than its factorization.

775400692728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77108691 (or 77108687 counting only the distinct ones).

The product of its (nonzero) digits is 11854080, while the sum is 57.

The spelling of 775400692728 in words is "seven hundred seventy-five billion, four hundred million, six hundred ninety-two thousand, seven hundred twenty-eight".