185005010051 has 4 divisors (see below), whose sum is σ = 188495670672. Its totient is φ = 181514349432.

The previous prime is 185005010041. The next prime is 185005010063. The reversal of 185005010051 is 150010500581.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-185005010051 is a prime.

It is a super-2 number, since 2×185005010051² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 185005010051.

It is not an unprimeable number, because it can be changed into a prime (185005010011) 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, 1745330231 + ... + 1745330336.

It is an arithmetic number, because the mean of its divisors is an integer number (47123917668).

Almost surely, 2^185005010051 is an apocalyptic number.

185005010051 is a deficient number, since it is larger than the sum of its proper divisors (3490660621).

185005010051 is an equidigital number, since it uses as much as digits as its factorization.

185005010051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3490660620.

The product of its (nonzero) digits is 1000, while the sum is 26.

The spelling of 185005010051 in words is "one hundred eighty-five billion, five million, ten thousand, fifty-one".