90421869515 has 8 divisors (see below), whose sum is σ = 108508500960. Its totient is φ = 72335990592.

The previous prime is 90421869457. The next prime is 90421869521. The reversal of 90421869515 is 51596812409.

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 90421869515 - 2¹⁸ = 90421607371 is a prime.

It is a super-2 number, since 2×90421869515² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123002 + ... + 442688.

It is an arithmetic number, because the mean of its divisors is an integer number (13563562620).

Almost surely, 2^90421869515 is an apocalyptic number.

90421869515 is a deficient number, since it is larger than the sum of its proper divisors (18086631445).

90421869515 is a wasteful number, since it uses less digits than its factorization.

90421869515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376261.

The product of its (nonzero) digits is 777600, while the sum is 50.

The spelling of 90421869515 in words is "ninety billion, four hundred twenty-one million, eight hundred sixty-nine thousand, five hundred fifteen".