642254161264 has 40 divisors (see below), whose sum is σ = 1343245232160. Its totient is φ = 296573131008.

The previous prime is 642254161261. The next prime is 642254161271. The reversal of 642254161264 is 462161452246.

It is a super-3 number, since 3×642254161264³ (a number of 36 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 642254161264.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642254161261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30079947 + ... + 30101290.

It is an arithmetic number, because the mean of its divisors is an integer number (33581130804).

Almost surely, 2^642254161264 is an apocalyptic number.

It is an amenable number.

642254161264 is an abundant number, since it is smaller than the sum of its proper divisors (700991070896).

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

642254161264 is a wasteful number, since it uses less digits than its factorization.

642254161264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60181297 (or 60181291 counting only the distinct ones).

The product of its digits is 552960, while the sum is 43.

The spelling of 642254161264 in words is "six hundred forty-two billion, two hundred fifty-four million, one hundred sixty-one thousand, two hundred sixty-four".