612375561 has 12 divisors (see below), whose sum is σ = 1010905792. Its totient is φ = 349928856.

The previous prime is 612375551. The next prime is 612375563. The reversal of 612375561 is 165573216.

612375561 is a `hidden beast` number, since 6 + 1 + 23 + 75 + 561 = 666.

It is not a de Polignac number, because 612375561 - 2¹³ = 612367369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (612375563) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4860061 + ... + 4860186.

Almost surely, 2^612375561 is an apocalyptic number.

It is an amenable number.

612375561 is a deficient number, since it is larger than the sum of its proper divisors (398530231).

612375561 is a wasteful number, since it uses less digits than its factorization.

612375561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9720260 (or 9720257 counting only the distinct ones).

The product of its digits is 37800, while the sum is 36.

The square root of 612375561 is about 24746.2231663743. The cubic root of 612375561 is about 849.1921094233.

The spelling of 612375561 in words is "six hundred twelve million, three hundred seventy-five thousand, five hundred sixty-one".