642452302646 has 32 divisors (see below), whose sum is σ = 1219401637632. Its totient is φ = 246570176160.

The previous prime is 642452302603. The next prime is 642452302693. The reversal of 642452302646 is 646203254246.

It is a super-2 number, since 2×642452302646² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 642452302597 and 642452302606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31122281 + ... + 31142916.

It is an arithmetic number, because the mean of its divisors is an integer number (38106301176).

Almost surely, 2^642452302646 is an apocalyptic number.

642452302646 is a deficient number, since it is larger than the sum of its proper divisors (576949334986).

642452302646 is a wasteful number, since it uses less digits than its factorization.

642452302646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62265284.

The product of its (nonzero) digits is 1658880, while the sum is 44.

The spelling of 642452302646 in words is "six hundred forty-two billion, four hundred fifty-two million, three hundred two thousand, six hundred forty-six".