2155110012646 has 16 divisors (see below), whose sum is σ = 3320238887280. Its totient is φ = 1048367305440.

The previous prime is 2155110012623. The next prime is 2155110012677. The reversal of 2155110012646 is 6462100115512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 323265 + ... + 2101123.

It is an arithmetic number, because the mean of its divisors is an integer number (207514930455).

Almost surely, 2^{2155110012646} is an apocalyptic number.

2155110012646 is a deficient number, since it is larger than the sum of its proper divisors (1165128874634).

2155110012646 is a wasteful number, since it uses less digits than its factorization.

2155110012646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1794279.

The product of its (nonzero) digits is 14400, while the sum is 34.

The spelling of 2155110012646 in words is "two trillion, one hundred fifty-five billion, one hundred ten million, twelve thousand, six hundred forty-six".