2106644165031 has 16 divisors (see below), whose sum is σ = 3254098751744. Its totient is φ = 1187306299584.

The previous prime is 2106644165023. The next prime is 2106644165063. The reversal of 2106644165031 is 1305614466012.

It is not a de Polignac number, because 2106644165031 - 2³ = 2106644165023 is a prime.

It is a super-2 number, since 2×2106644165031² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2106644165531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 687097021 + ... + 687100086.

It is an arithmetic number, because the mean of its divisors is an integer number (203381171984).

Almost surely, 2^{2106644165031} is an apocalyptic number.

2106644165031 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2106644165031 is a deficient number, since it is larger than the sum of its proper divisors (1147454586713).

2106644165031 is a wasteful number, since it uses less digits than its factorization.

2106644165031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1374197190.

The product of its (nonzero) digits is 103680, while the sum is 39.

The spelling of 2106644165031 in words is "two trillion, one hundred six billion, six hundred forty-four million, one hundred sixty-five thousand, thirty-one".