642815016294 has 32 divisors (see below), whose sum is σ = 1402553320704. Its totient is φ = 194785786080.

The previous prime is 642815016293. The next prime is 642815016313. The reversal of 642815016294 is 492610518246.

It is a super-2 number, since 2×642815016294² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642815016293) 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, 1995372 + ... + 2295024.

It is an arithmetic number, because the mean of its divisors is an integer number (43829791272).

Almost surely, 2^642815016294 is an apocalyptic number.

642815016294 is an abundant number, since it is smaller than the sum of its proper divisors (759738304410).

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

642815016294 is a wasteful number, since it uses less digits than its factorization.

642815016294 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332172.

The product of its (nonzero) digits is 829440, while the sum is 48.

The spelling of 642815016294 in words is "six hundred forty-two billion, eight hundred fifteen million, sixteen thousand, two hundred ninety-four".