90406973186 has 8 divisors (see below), whose sum is σ = 140286682620. Its totient is φ = 43644745648.

The previous prime is 90406973179. The next prime is 90406973219. The reversal of 90406973186 is 68137960409.

It can be written as a sum of positive squares in 2 ways, for example, as 88286831161 + 2120142025 = 297131^2 + 46045^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 779370401 + ... + 779370516.

Almost surely, 2^90406973186 is an apocalyptic number.

90406973186 is a deficient number, since it is larger than the sum of its proper divisors (49879709434).

90406973186 is a wasteful number, since it uses less digits than its factorization.

90406973186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1558740948.

The product of its (nonzero) digits is 1959552, while the sum is 53.

The spelling of 90406973186 in words is "ninety billion, four hundred six million, nine hundred seventy-three thousand, one hundred eighty-six".