642029642370 has 48 divisors (see below), whose sum is σ = 1709991154872. Its totient is φ = 167032101120.

The previous prime is 642029642347. The next prime is 642029642477. The reversal of 642029642370 is 73246920246.

It can be written as a sum of positive squares in 4 ways, for example, as 205450973289 + 436578669081 = 453267^2 + 660741^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 86992197 + ... + 86999576.

Almost surely, 2^642029642370 is an apocalyptic number.

642029642370 is an abundant number, since it is smaller than the sum of its proper divisors (1067961512502).

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

642029642370 is a wasteful number, since it uses less digits than its factorization.

642029642370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173991827 (or 173991824 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 45.

The spelling of 642029642370 in words is "six hundred forty-two billion, twenty-nine million, six hundred forty-two thousand, three hundred seventy".