77612397500 has 60 divisors (see below), whose sum is σ = 185152201080. Its totient is φ = 28222680000.

The previous prime is 77612397493. The next prime is 77612397539. The reversal of 77612397500 is 579321677.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1383635 + ... + 1438634.

It is an arithmetic number, because the mean of its divisors is an integer number (3085870018).

Almost surely, 2^77612397500 is an apocalyptic number.

It is an amenable number.

77612397500 is an abundant number, since it is smaller than the sum of its proper divisors (107539803580).

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

77612397500 is a wasteful number, since it uses less digits than its factorization.

77612397500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2822304 (or 2822287 counting only the distinct ones).

The product of its (nonzero) digits is 555660, while the sum is 47.

The spelling of 77612397500 in words is "seventy-seven billion, six hundred twelve million, three hundred ninety-seven thousand, five hundred".