2056665172000 has 48 divisors (see below), whose sum is σ = 5053226337432. Its totient is φ = 822666067200.

The previous prime is 2056665171989. The next prime is 2056665172019. The reversal of 2056665172000 is 2715666502.

It can be written as a sum of positive squares in 4 ways, for example, as 655367964304 + 1401297207696 = 809548^2 + 1183764^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

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, 257079147 + ... + 257087146.

Almost surely, 2^{2056665172000} is an apocalyptic number.

2056665172000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2056665172000 is an abundant number, since it is smaller than the sum of its proper divisors (2996561165432).

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

2056665172000 is an equidigital number, since it uses as much as digits as its factorization.

2056665172000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514166318 (or 514166300 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 40.

The spelling of 2056665172000 in words is "two trillion, fifty-six billion, six hundred sixty-five million, one hundred seventy-two thousand".