642484363788 has 36 divisors (see below), whose sum is σ = 1625323642488. Its totient is φ = 213994516800.

The previous prime is 642484363777. The next prime is 642484363847. The reversal of 642484363788 is 887363484246.

It is a happy number.

642484363788 is a `hidden beast` number, since 6 + 42 + 484 + 3 + 6 + 37 + 88 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×642484363788² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6908913 + ... + 7001288.

It is an arithmetic number, because the mean of its divisors is an integer number (45147878958).

Almost surely, 2^642484363788 is an apocalyptic number.

It is an amenable number.

642484363788 is an abundant number, since it is smaller than the sum of its proper divisors (982839278700).

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

642484363788 is a wasteful number, since it uses less digits than its factorization.

642484363788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13911494 (or 13911489 counting only the distinct ones).

The product of its digits is 148635648, while the sum is 63.

The spelling of 642484363788 in words is "six hundred forty-two billion, four hundred eighty-four million, three hundred sixty-three thousand, seven hundred eighty-eight".