646226011632642 has 64 divisors (see below), whose sum is σ = 1499576230723584. Its totient is φ = 181826603228160.

The previous prime is 646226011632613. The next prime is 646226011632647. The reversal of 646226011632642 is 246236110622646.

It is a happy number.

It is a super-2 number, since 2×646226011632642² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (646226011632647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24318943 + ... + 43403490.

It is an arithmetic number, because the mean of its divisors is an integer number (23430878605056).

Almost surely, 2^{646226011632642} is an apocalyptic number.

646226011632642 is an abundant number, since it is smaller than the sum of its proper divisors (853350219090942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

646226011632642 is a wasteful number, since it uses less digits than its factorization.

646226011632642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67725903.

The product of its (nonzero) digits is 5971968, while the sum is 51.

The spelling of 646226011632642 in words is "six hundred forty-six trillion, two hundred twenty-six billion, eleven million, six hundred thirty-two thousand, six hundred forty-two".