642266956 has 12 divisors (see below), whose sum is σ = 1183123480. Its totient is φ = 304231680.

The previous prime is 642266941. The next prime is 642266969. The reversal of 642266956 is 659662246.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4225365 + ... + 4225516.

Almost surely, 2^642266956 is an apocalyptic number.

It is an amenable number.

642266956 is a deficient number, since it is larger than the sum of its proper divisors (540856524).

642266956 is a wasteful number, since it uses less digits than its factorization.

642266956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8450904 (or 8450902 counting only the distinct ones).

The product of its digits is 933120, while the sum is 46.

The square root of 642266956 is about 25342.9863275818. The cubic root of 642266956 is about 862.7901788021.

The spelling of 642266956 in words is "six hundred forty-two million, two hundred sixty-six thousand, nine hundred fifty-six".