642401228763 has 12 divisors (see below), whose sum is σ = 1060471869808. Its totient is φ = 367086416400.

The previous prime is 642401228743. The next prime is 642401228789. The reversal of 642401228763 is 367822104246.

It is a happy number.

642401228763 is a `hidden beast` number, since 64 + 240 + 12 + 287 + 63 = 666.

It is not a de Polignac number, because 642401228763 - 2⁸ = 642401228507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642401228713) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5098422388 + ... + 5098422513.

Almost surely, 2^642401228763 is an apocalyptic number.

642401228763 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

642401228763 is a deficient number, since it is larger than the sum of its proper divisors (418070641045).

642401228763 is a wasteful number, since it uses less digits than its factorization.

642401228763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10196844914 (or 10196844911 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 45.

The spelling of 642401228763 in words is "six hundred forty-two billion, four hundred one million, two hundred twenty-eight thousand, seven hundred sixty-three".