185919955456 has 40 divisors (see below), whose sum is σ = 393328380060. Its totient is φ = 87491739648.

The previous prime is 185919955453. The next prime is 185919955499. The reversal of 185919955456 is 654559919581.

It can be written as a sum of positive squares in 2 ways, for example, as 185919641856 + 313600 = 431184^2 + 560^2 .

It is a super-2 number, since 2×185919955456² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 185919955391 and 185919955400.

It is not an unprimeable number, because it can be changed into a prime (185919955453) 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, 10671441 + ... + 10688848.

Almost surely, 2^185919955456 is an apocalyptic number.

185919955456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

185919955456 is an abundant number, since it is smaller than the sum of its proper divisors (207408424604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

185919955456 is an equidigital number, since it uses as much as digits as its factorization.

185919955456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21360324 (or 21360308 counting only the distinct ones).

The product of its digits is 87480000, while the sum is 67.

The spelling of 185919955456 in words is "one hundred eighty-five billion, nine hundred nineteen million, nine hundred fifty-five thousand, four hundred fifty-six".