90917355381 has 8 divisors (see below), whose sum is σ = 121233301344. Its totient is φ = 60606489840.

The previous prime is 90917355379. The next prime is 90917355421. The reversal of 90917355381 is 18355371909.

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

It is not a de Polignac number, because 90917355381 - 2¹ = 90917355379 is a prime.

It is a super-2 number, since 2×90917355381² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90917355371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1228150 + ... + 1300071.

It is an arithmetic number, because the mean of its divisors is an integer number (15154162668).

Almost surely, 2^90917355381 is an apocalyptic number.

It is an amenable number.

90917355381 is a deficient number, since it is larger than the sum of its proper divisors (30315945963).

90917355381 is a wasteful number, since it uses less digits than its factorization.

90917355381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2540211.

The product of its (nonzero) digits is 1020600, while the sum is 51.

The spelling of 90917355381 in words is "ninety billion, nine hundred seventeen million, three hundred fifty-five thousand, three hundred eighty-one".