77240597652 has 48 divisors (see below), whose sum is σ = 200277784000. Its totient is φ = 25743731040.

The previous prime is 77240597641. The next prime is 77240597657. The reversal of 77240597652 is 25679504277.

It is a happy number.

77240597652 is a `hidden beast` number, since 7 + 7 + 2 + 40 + 597 + 6 + 5 + 2 = 666.

It is a super-2 number, since 2×77240597652² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77240597657) 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 15 ways as a sum of consecutive naturals, for example, 952599 + ... + 1030497.

Almost surely, 2^77240597652 is an apocalyptic number.

It is an amenable number.

77240597652 is an abundant number, since it is smaller than the sum of its proper divisors (123037186348).

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

77240597652 is a wasteful number, since it uses less digits than its factorization.

77240597652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87093 (or 87085 counting only the distinct ones).

The product of its (nonzero) digits is 7408800, while the sum is 54.

The spelling of 77240597652 in words is "seventy-seven billion, two hundred forty million, five hundred ninety-seven thousand, six hundred fifty-two".