642102850724654 has 16 divisors (see below), whose sum is σ = 1096396962503040. Its totient is φ = 279175152488760.

The previous prime is 642102850724653. The next prime is 642102850724717. The reversal of 642102850724654 is 456427058201246.

It is a self number, because there is not a number n which added to its sum of digits gives 642102850724654.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642102850724653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 634488982424 + ... + 634488983435.

It is an arithmetic number, because the mean of its divisors is an integer number (68524810156440).

Almost surely, 2^{642102850724654} is an apocalyptic number.

642102850724654 is a deficient number, since it is larger than the sum of its proper divisors (454294111778386).

642102850724654 is a wasteful number, since it uses less digits than its factorization.

642102850724654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1268977965895.

The product of its (nonzero) digits is 25804800, while the sum is 56.

The spelling of 642102850724654 in words is "six hundred forty-two trillion, one hundred two billion, eight hundred fifty million, seven hundred twenty-four thousand, six hundred fifty-four".