642370155643604 has 12 divisors (see below), whose sum is σ = 1124155290644064. Its totient is φ = 321182929745304.

The previous prime is 642370155643501. The next prime is 642370155643621. The reversal of 642370155643604 is 406346551073246.

It is a super-2 number, since 2×642370155643604² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 642370155643604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 536346182 + ... + 537542525.

It is an arithmetic number, because the mean of its divisors is an integer number (93679607553672).

Almost surely, 2^{642370155643604} is an apocalyptic number.

It is an amenable number.

642370155643604 is a deficient number, since it is larger than the sum of its proper divisors (481785135000460).

642370155643604 is a wasteful number, since it uses less digits than its factorization.

642370155643604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074038254 (or 1074038252 counting only the distinct ones).

The product of its (nonzero) digits is 43545600, while the sum is 56.

The spelling of 642370155643604 in words is "six hundred forty-two trillion, three hundred seventy billion, one hundred fifty-five million, six hundred forty-three thousand, six hundred four".