16720356126025 has 24 divisors (see below), whose sum is σ = 21856419090720. Its totient is φ = 12653715824640.

The previous prime is 16720356126011. The next prime is 16720356126043. The reversal of 16720356126025 is 52062165302761.

It is a happy number.

It is not a de Polignac number, because 16720356126025 - 2²⁷ = 16720221908297 is a prime.

It is a super-2 number, since 2×16720356126025² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25444792 + ... + 26093641.

It is an arithmetic number, because the mean of its divisors is an integer number (910684128780).

Almost surely, 2^{16720356126025} is an apocalyptic number.

It is an amenable number.

16720356126025 is a deficient number, since it is larger than the sum of its proper divisors (5136062964695).

16720356126025 is a wasteful number, since it uses less digits than its factorization.

16720356126025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51539145 (or 51539140 counting only the distinct ones).

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

The spelling of 16720356126025 in words is "sixteen trillion, seven hundred twenty billion, three hundred fifty-six million, one hundred twenty-six thousand, twenty-five".