90919818894270 has 64 divisors (see below), whose sum is σ = 224529546827520. Its totient is φ = 23549142586368.

The previous prime is 90919818894269. The next prime is 90919818894319. The reversal of 90919818894270 is 7249881891909.

It is a junction number, because it is equal to n+sod(n) for n = 90919818894192 and 90919818894201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 196641939 + ... + 197103758.

It is an arithmetic number, because the mean of its divisors is an integer number (3508274169180).

Almost surely, 2^{90919818894270} is an apocalyptic number.

90919818894270 is an abundant number, since it is smaller than the sum of its proper divisors (133609727933250).

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

90919818894270 is a wasteful number, since it uses less digits than its factorization.

90919818894270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393745929.

The product of its (nonzero) digits is 188116992, while the sum is 75.

The spelling of 90919818894270 in words is "ninety trillion, nine hundred nineteen billion, eight hundred eighteen million, eight hundred ninety-four thousand, two hundred seventy".