646250215023 has 16 divisors (see below), whose sum is σ = 1094180258560. Its totient is φ = 369285837048.

The previous prime is 646250215007. The next prime is 646250215031. The reversal of 646250215023 is 320512052646.

646250215023 is a `hidden beast` number, since 6 + 4 + 625 + 0 + 2 + 1 + 5 + 0 + 23 = 666.

It is not a de Polignac number, because 646250215023 - 2⁴ = 646250215007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646250215003) 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, 1709656465 + ... + 1709656842.

It is an arithmetic number, because the mean of its divisors is an integer number (68386266160).

Almost surely, 2^646250215023 is an apocalyptic number.

646250215023 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

646250215023 is a deficient number, since it is larger than the sum of its proper divisors (447930043537).

646250215023 is a wasteful number, since it uses less digits than its factorization.

646250215023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3419313323 (or 3419313317 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

Adding to 646250215023 its reverse (320512052646), we get a palindrome (966762267669).

The spelling of 646250215023 in words is "six hundred forty-six billion, two hundred fifty million, two hundred fifteen thousand, twenty-three".