642041546516 has 12 divisors (see below), whose sum is σ = 1123952697588. Its totient is φ = 320912204352.

The previous prime is 642041546501. The next prime is 642041546521. The reversal of 642041546516 is 615645140246.

It can be written as a sum of positive squares in 2 ways, for example, as 290930784400 + 351110762116 = 539380^2 + 592546^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27128921 + ... + 27152576.

It is an arithmetic number, because the mean of its divisors is an integer number (93662724799).

Almost surely, 2^642041546516 is an apocalyptic number.

It is an amenable number.

642041546516 is a deficient number, since it is larger than the sum of its proper divisors (481911151072).

642041546516 is a wasteful number, since it uses less digits than its factorization.

642041546516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54284458 (or 54284456 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 44.

The spelling of 642041546516 in words is "six hundred forty-two billion, forty-one million, five hundred forty-six thousand, five hundred sixteen".