612644206455 has 32 divisors (see below), whose sum is σ = 1114474225920. Its totient is φ = 319144885920.

The previous prime is 612644206411. The next prime is 612644206469. The reversal of 612644206455 is 554602446216.

612644206455 is a `hidden beast` number, since 61 + 2 + 64 + 420 + 64 + 55 = 666.

It is not a de Polignac number, because 612644206455 - 2¹¹ = 612644204407 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 612644206455.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52762861 + ... + 52774470.

It is an arithmetic number, because the mean of its divisors is an integer number (34827319560).

Almost surely, 2^612644206455 is an apocalyptic number.

612644206455 is a deficient number, since it is larger than the sum of its proper divisors (501830019465).

612644206455 is a wasteful number, since it uses less digits than its factorization.

612644206455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105537388 (or 105537382 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 45.

The spelling of 612644206455 in words is "six hundred twelve billion, six hundred forty-four million, two hundred six thousand, four hundred fifty-five".