646266566131 has 16 divisors (see below), whose sum is σ = 660161238048. Its totient is φ = 632480083200.

The previous prime is 646266566089. The next prime is 646266566149. The reversal of 646266566131 is 131665662646.

It is a cyclic number.

It is not a de Polignac number, because 646266566131 - 2¹⁹ = 646266041843 is a prime.

It is a super-2 number, since 2×646266566131² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (646266560131) 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, 83310105 + ... + 83317861.

It is an arithmetic number, because the mean of its divisors is an integer number (41260077378).

Almost surely, 2^646266566131 is an apocalyptic number.

646266566131 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

646266566131 is a deficient number, since it is larger than the sum of its proper divisors (13894671917).

646266566131 is a wasteful number, since it uses less digits than its factorization.

646266566131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14502.

The product of its digits is 5598720, while the sum is 52.

The spelling of 646266566131 in words is "six hundred forty-six billion, two hundred sixty-six million, five hundred sixty-six thousand, one hundred thirty-one".