77452478152 has 32 divisors (see below), whose sum is σ = 167520726720. Its totient is φ = 32883693120.

The previous prime is 77452478137. The next prime is 77452478239. The reversal of 77452478152 is 25187425477.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 77452478152.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6456999 + ... + 6468982.

It is an arithmetic number, because the mean of its divisors is an integer number (5235022710).

Almost surely, 2^77452478152 is an apocalyptic number.

It is an amenable number.

77452478152 is an abundant number, since it is smaller than the sum of its proper divisors (90068248568).

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

77452478152 is a wasteful number, since it uses less digits than its factorization.

77452478152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12926101 (or 12926097 counting only the distinct ones).

The product of its digits is 4390400, while the sum is 52.

The spelling of 77452478152 in words is "seventy-seven billion, four hundred fifty-two million, four hundred seventy-eight thousand, one hundred fifty-two".