78069431156 has 12 divisors (see below), whose sum is σ = 136624309668. Its totient is φ = 39033914112.

The previous prime is 78069431149. The next prime is 78069431183. The reversal of 78069431156 is 65113496087.

It can be written as a sum of positive squares in 2 ways, for example, as 54802810000 + 23266621156 = 234100^2 + 152534^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54950 + ... + 398946.

It is an arithmetic number, because the mean of its divisors is an integer number (11385359139).

Almost surely, 2^78069431156 is an apocalyptic number.

It is an amenable number.

78069431156 is a deficient number, since it is larger than the sum of its proper divisors (58554878512).

78069431156 is a wasteful number, since it uses less digits than its factorization.

78069431156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400738 (or 400736 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 50.

The spelling of 78069431156 in words is "seventy-eight billion, sixty-nine million, four hundred thirty-one thousand, one hundred fifty-six".