90727272806 has 4 divisors (see below), whose sum is σ = 136090909212. Its totient is φ = 45363636402.

The previous prime is 90727272803. The next prime is 90727272841. The reversal of 90727272806 is 60827272709.

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

It is a super-2 number, since 2×90727272806² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90727272803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22681818200 + ... + 22681818203.

It is an arithmetic number, because the mean of its divisors is an integer number (34022727303).

Almost surely, 2^90727272806 is an apocalyptic number.

90727272806 is a deficient number, since it is larger than the sum of its proper divisors (45363636406).

90727272806 is a wasteful number, since it uses less digits than its factorization.

90727272806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45363636405.

The product of its (nonzero) digits is 1185408, while the sum is 50.

The spelling of 90727272806 in words is "ninety billion, seven hundred twenty-seven million, two hundred seventy-two thousand, eight hundred six".