8156234398856 has 8 divisors (see below), whose sum is σ = 15292939497870. Its totient is φ = 4078117199424.

The previous prime is 8156234398843. The next prime is 8156234398891. The reversal of 8156234398856 is 6588934326518.

It can be written as a sum of positive squares in only one way, i.e., 6960785188900 + 1195449209956 = 2638330^2 + 1093366^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 509764649921 + ... + 509764649936.

Almost surely, 2^{8156234398856} is an apocalyptic number.

It is an amenable number.

8156234398856 is a deficient number, since it is larger than the sum of its proper divisors (7136705099014).

8156234398856 is a wasteful number, since it uses less digits than its factorization.

8156234398856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1019529299863 (or 1019529299859 counting only the distinct ones).

The product of its digits is 298598400, while the sum is 68.

The spelling of 8156234398856 in words is "eight trillion, one hundred fifty-six billion, two hundred thirty-four million, three hundred ninety-eight thousand, eight hundred fifty-six".