2156135566210 has 8 divisors (see below), whose sum is σ = 3881044019196. Its totient is φ = 862454226480.

The previous prime is 2156135566201. The next prime is 2156135566229. The reversal of 2156135566210 is 126655316512.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2128678082001 + 27457484209 = 1458999^2 + 165703^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 107806778301 + ... + 107806778320.

Almost surely, 2^{2156135566210} is an apocalyptic number.

2156135566210 is a deficient number, since it is larger than the sum of its proper divisors (1724908452986).

2156135566210 is a wasteful number, since it uses less digits than its factorization.

2156135566210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215613556628.

The product of its (nonzero) digits is 324000, while the sum is 43.

The spelling of 2156135566210 in words is "two trillion, one hundred fifty-six billion, one hundred thirty-five million, five hundred sixty-six thousand, two hundred ten".