56606158509 has 4 divisors (see below), whose sum is σ = 75474878016. Its totient is φ = 37737439004.

The previous prime is 56606158489. The next prime is 56606158541. The reversal of 56606158509 is 90585160665.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 56606158509 - 2¹⁶ = 56606092973 is a prime.

It is a super-2 number, since 2×56606158509² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56606158579) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9434359749 + ... + 9434359754.

It is an arithmetic number, because the mean of its divisors is an integer number (18868719504).

Almost surely, 2^56606158509 is an apocalyptic number.

It is an amenable number.

56606158509 is a deficient number, since it is larger than the sum of its proper divisors (18868719507).

56606158509 is a wasteful number, since it uses less digits than its factorization.

56606158509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18868719506.

The product of its (nonzero) digits is 1944000, while the sum is 51.

The spelling of 56606158509 in words is "fifty-six billion, six hundred six million, one hundred fifty-eight thousand, five hundred nine".