185421495472 has 20 divisors (see below), whose sum is σ = 360401934040. Its totient is φ = 92414544768.

The previous prime is 185421495461. The next prime is 185421495593. The reversal of 185421495472 is 274594124581.

It is a happy number.

It is a super-2 number, since 2×185421495472² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18507522 + ... + 18517537.

It is an arithmetic number, because the mean of its divisors is an integer number (18020096702).

Almost surely, 2^185421495472 is an apocalyptic number.

It is an amenable number.

185421495472 is a deficient number, since it is larger than the sum of its proper divisors (174980438568).

185421495472 is a wasteful number, since it uses less digits than its factorization.

185421495472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37025380 (or 37025374 counting only the distinct ones).

The product of its digits is 3225600, while the sum is 52.

The spelling of 185421495472 in words is "one hundred eighty-five billion, four hundred twenty-one million, four hundred ninety-five thousand, four hundred seventy-two".