90455689279 has 4 divisors (see below), whose sum is σ = 90469512184. Its totient is φ = 90441866376.

The previous prime is 90455689267. The next prime is 90455689297. The reversal of 90455689279 is 97298655409.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97298655409 = 65651 ⋅1482059.

It is a cyclic number.

It is not a de Polignac number, because 90455689279 - 2⁷ = 90455689151 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90455689279.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90455689979) 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, 6901632 + ... + 6914725.

It is an arithmetic number, because the mean of its divisors is an integer number (22617378046).

Almost surely, 2^90455689279 is an apocalyptic number.

90455689279 is a deficient number, since it is larger than the sum of its proper divisors (13822905).

90455689279 is a wasteful number, since it uses less digits than its factorization.

90455689279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13822904.

The product of its (nonzero) digits is 48988800, while the sum is 64.

The spelling of 90455689279 in words is "ninety billion, four hundred fifty-five million, six hundred eighty-nine thousand, two hundred seventy-nine".