642288615132490 has 32 divisors (see below), whose sum is σ = 1175717247264000. Its totient is φ = 252560411189568.

The previous prime is 642288615132457. The next prime is 642288615132533. The reversal of 642288615132490 is 94231516882246.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 388592431 + ... + 390241789.

It is an arithmetic number, because the mean of its divisors is an integer number (36741163977000).

Almost surely, 2^{642288615132490} is an apocalyptic number.

642288615132490 is a deficient number, since it is larger than the sum of its proper divisors (533428632131510).

642288615132490 is a wasteful number, since it uses less digits than its factorization.

642288615132490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2309454.

The product of its (nonzero) digits is 39813120, while the sum is 61.

The spelling of 642288615132490 in words is "six hundred forty-two trillion, two hundred eighty-eight billion, six hundred fifteen million, one hundred thirty-two thousand, four hundred ninety".