77215725192 has 16 divisors (see below), whose sum is σ = 193039313040. Its totient is φ = 25738575056.

The previous prime is 77215725187. The next prime is 77215725233. The reversal of 77215725192 is 29152751277.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1608660918 + ... + 1608660965.

It is an arithmetic number, because the mean of its divisors is an integer number (12064957065).

Almost surely, 2^77215725192 is an apocalyptic number.

It is an amenable number.

77215725192 is an abundant number, since it is smaller than the sum of its proper divisors (115823587848).

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

77215725192 is a wasteful number, since it uses less digits than its factorization.

77215725192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3217321892 (or 3217321888 counting only the distinct ones).

The product of its digits is 617400, while the sum is 48.

The spelling of 77215725192 in words is "seventy-seven billion, two hundred fifteen million, seven hundred twenty-five thousand, one hundred ninety-two".