642644606346 has 32 divisors (see below), whose sum is σ = 1368137563200. Its totient is φ = 200660169600.

The previous prime is 642644606339. The next prime is 642644606353. The reversal of 642644606346 is 643606446246.

It is an interprime number because it is at equal distance from previous prime (642644606339) and next prime (642644606353).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31659705 + ... + 31679996.

It is an arithmetic number, because the mean of its divisors is an integer number (42754298850).

Almost surely, 2^642644606346 is an apocalyptic number.

642644606346 is an abundant number, since it is smaller than the sum of its proper divisors (725492956854).

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

642644606346 is a wasteful number, since it uses less digits than its factorization.

642644606346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63339814.

The product of its (nonzero) digits is 11943936, while the sum is 51.

It can be divided in two parts, 642644 and 606346, that added together give a triangular number (1248990 = T₁₅₈₀).

The spelling of 642644606346 in words is "six hundred forty-two billion, six hundred forty-four million, six hundred six thousand, three hundred forty-six".