185012867851 has 16 divisors (see below), whose sum is σ = 214045058304. Its totient is φ = 156632092704.

The previous prime is 185012867801. The next prime is 185012867881. The reversal of 185012867851 is 158768210581.

It is a cyclic number.

It is not a de Polignac number, because 185012867851 - 2⁷ = 185012867723 is a prime.

It is a super-2 number, since 2×185012867851² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (185012867801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2376916 + ... + 2453518.

It is an arithmetic number, because the mean of its divisors is an integer number (13377816144).

Almost surely, 2^185012867851 is an apocalyptic number.

185012867851 is a deficient number, since it is larger than the sum of its proper divisors (29032190453).

185012867851 is an equidigital number, since it uses as much as digits as its factorization.

185012867851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80850.

The product of its (nonzero) digits is 1075200, while the sum is 52.

The spelling of 185012867851 in words is "one hundred eighty-five billion, twelve million, eight hundred sixty-seven thousand, eight hundred fifty-one".