1572162056721 has 16 divisors (see below), whose sum is σ = 2329625670720. Its totient is φ = 1047884523840.

The previous prime is 1572162056687. The next prime is 1572162056819. The reversal of 1572162056721 is 1276502612751.

1572162056721 is a `hidden beast` number, since 1 + 5 + 7 + 2 + 1 + 62 + 0 + 567 + 21 = 666.

It is not a de Polignac number, because 1572162056721 - 2¹⁰ = 1572162055697 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1572162056821) 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, 6079720 + ... + 6333033.

It is an arithmetic number, because the mean of its divisors is an integer number (145601604420).

Almost surely, 2^{1572162056721} is an apocalyptic number.

It is an amenable number.

1572162056721 is a deficient number, since it is larger than the sum of its proper divisors (757463613999).

1572162056721 is a wasteful number, since it uses less digits than its factorization.

1572162056721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12417453 (or 12417447 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 45.

The spelling of 1572162056721 in words is "one trillion, five hundred seventy-two billion, one hundred sixty-two million, fifty-six thousand, seven hundred twenty-one".