90369635981 has 8 divisors (see below), whose sum is σ = 90647132544. Its totient is φ = 90092548080.

The previous prime is 90369635969. The next prime is 90369636013. The reversal of 90369635981 is 18953696309.

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

It is a cyclic number.

It is not a de Polignac number, because 90369635981 - 2¹⁴ = 90369619597 is a prime.

It is a super-2 number, since 2×90369635981² (a number of 23 digits) contains 22 as substring.

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 90369635981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90369635911) 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, 343760 + ... + 546726.

It is an arithmetic number, because the mean of its divisors is an integer number (11330891568).

Almost surely, 2^90369635981 is an apocalyptic number.

It is an amenable number.

90369635981 is a deficient number, since it is larger than the sum of its proper divisors (277496563).

90369635981 is a wasteful number, since it uses less digits than its factorization.

90369635981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204331.

The product of its (nonzero) digits is 9447840, while the sum is 59.

The spelling of 90369635981 in words is "ninety billion, three hundred sixty-nine million, six hundred thirty-five thousand, nine hundred eighty-one".