642311106265450 has 24 divisors (see below), whose sum is σ = 1194707378700000. Its totient is φ = 256922567012400.

The previous prime is 642311106265391. The next prime is 642311106265531. The reversal of 642311106265450 is 54562601113246.

It is a self number, because there is not a number n which added to its sum of digits gives 642311106265450.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39959200 + ... + 53678299.

It is an arithmetic number, because the mean of its divisors is an integer number (49779474112500).

Almost surely, 2^{642311106265450} is an apocalyptic number.

642311106265450 is a deficient number, since it is larger than the sum of its proper divisors (552396272434550).

642311106265450 is a wasteful number, since it uses less digits than its factorization.

642311106265450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93774702 (or 93774697 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 46.

Adding to 642311106265450 its reverse (54562601113246), we get a palindrome (696873707378696).

The spelling of 642311106265450 in words is "six hundred forty-two trillion, three hundred eleven billion, one hundred six million, two hundred sixty-five thousand, four hundred fifty".