2156316423434 has 4 divisors (see below), whose sum is σ = 3234474635154. Its totient is φ = 1078158211716.

The previous prime is 2156316423427. The next prime is 2156316423491. The reversal of 2156316423434 is 4343246136512.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1594120882225 + 562195541209 = 1262585^2 + 749797^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 539079105857 + ... + 539079105860.

Almost surely, 2^{2156316423434} is an apocalyptic number.

2156316423434 is a deficient number, since it is larger than the sum of its proper divisors (1078158211720).

2156316423434 is a wasteful number, since it uses less digits than its factorization.

2156316423434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078158211719.

The product of its digits is 1244160, while the sum is 44.

The spelling of 2156316423434 in words is "two trillion, one hundred fifty-six billion, three hundred sixteen million, four hundred twenty-three thousand, four hundred thirty-four".