3125664665213 has 16 divisors (see below), whose sum is σ = 3245705285760. Its totient is φ = 3008473986816.

The previous prime is 3125664665177. The next prime is 3125664665231.

3125664665213 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 3125664665213 - 2¹⁶ = 3125664599677 is a prime.

It is a super-2 number, since 2×3125664665213² (a number of 26 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 (3125664665293) 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, 2058545 + ... + 3238662.

It is an arithmetic number, because the mean of its divisors is an integer number (202856580360).

Almost surely, 2^{3125664665213} is an apocalyptic number.

It is an amenable number.

3125664665213 is a deficient number, since it is larger than the sum of its proper divisors (120040620547).

3125664665213 is a wasteful number, since it uses less digits than its factorization.

3125664665213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5297476.

The product of its digits is 4665600, while the sum is 50.

The spelling of 3125664665213 in words is "three trillion, one hundred twenty-five billion, six hundred sixty-four million, six hundred sixty-five thousand, two hundred thirteen".