642650505160 has 16 divisors (see below), whose sum is σ = 1445963636700. Its totient is φ = 257060202048.

The previous prime is 642650505151. The next prime is 642650505197. The reversal of 642650505160 is 61505056246.

It can be written as a sum of positive squares in 2 ways, for example, as 636137046724 + 6513458436 = 797582^2 + 80706^2 .

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 16066262629 = 642650505160 / (6 + 4 + 2 + 6 + 5 + 0 + 5 + 0 + 5 + 1 + 6 + 0).

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, 8033131275 + ... + 8033131354.

Almost surely, 2^642650505160 is an apocalyptic number.

It is an amenable number.

642650505160 is an abundant number, since it is smaller than the sum of its proper divisors (803313131540).

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

642650505160 is a wasteful number, since it uses less digits than its factorization.

642650505160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16066262640 (or 16066262636 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 40.

The spelling of 642650505160 in words is "six hundred forty-two billion, six hundred fifty million, five hundred five thousand, one hundred sixty".