2100765665620 has 48 divisors (see below), whose sum is σ = 4645465171200. Its totient is φ = 795793783680.

The previous prime is 2100765665599. The next prime is 2100765665641. The reversal of 2100765665620 is 265665670012.

It is an interprime number because it is at equal distance from previous prime (2100765665599) and next prime (2100765665641).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68725 + ... + 2050915.

It is an arithmetic number, because the mean of its divisors is an integer number (96780524400).

Almost surely, 2^{2100765665620} is an apocalyptic number.

2100765665620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2100765665620 is an abundant number, since it is smaller than the sum of its proper divisors (2544699505580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2100765665620 is a wasteful number, since it uses less digits than its factorization.

2100765665620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1985008 (or 1985006 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 46.

The spelling of 2100765665620 in words is "two trillion, one hundred billion, seven hundred sixty-five million, six hundred sixty-five thousand, six hundred twenty".