77672478425 has 12 divisors (see below), whose sum is σ = 99635042220. Its totient is φ = 59995293120.

The previous prime is 77672478407. The next prime is 77672478431. The reversal of 77672478425 is 52487427677.

It can be written as a sum of positive squares in 6 ways, for example, as 5014197721 + 72658280704 = 70811^2 + 269552^2 .

It is a de Polignac number, because none of the positive numbers 2^k-77672478425 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53566502 + ... + 53567951.

It is an arithmetic number, because the mean of its divisors is an integer number (8302920185).

Almost surely, 2^77672478425 is an apocalyptic number.

It is an amenable number.

77672478425 is a deficient number, since it is larger than the sum of its proper divisors (21962563795).

77672478425 is a wasteful number, since it uses less digits than its factorization.

77672478425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107134492 (or 107134487 counting only the distinct ones).

The product of its digits is 36879360, while the sum is 59.

The spelling of 77672478425 in words is "seventy-seven billion, six hundred seventy-two million, four hundred seventy-eight thousand, four hundred twenty-five".