90687435965199 has 10 divisors (see below), whose sum is σ = 135471354960480. Its totient is φ = 60458290643412.

The previous prime is 90687435965171. The next prime is 90687435965257. The reversal of 90687435965199 is 99156953478609.

90687435965199 is a `hidden beast` number, since 9 + 0 + 6 + 8 + 7 + 4 + 3 + 5 + 96 + 519 + 9 = 666.

It is not a de Polignac number, because 90687435965199 - 2⁵ = 90687435965167 is a prime.

It is a super-2 number, since 2×90687435965199² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (81), and also a Moran number because the ratio is a prime number: 1119597974879 = 90687435965199 / (9 + 0 + 6 + 8 + 7 + 4 + 3 + 5 + 9 + 6 + 5 + 1 + 9 + 9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90687435965129) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 559798987359 + ... + 559798987520.

It is an arithmetic number, because the mean of its divisors is an integer number (13547135496048).

Almost surely, 2^{90687435965199} is an apocalyptic number.

90687435965199 is a deficient number, since it is larger than the sum of its proper divisors (44783918995281).

90687435965199 is a wasteful number, since it uses less digits than its factorization.

90687435965199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1119597974891 (or 1119597974882 counting only the distinct ones).

The product of its (nonzero) digits is 3968092800, while the sum is 81.

The spelling of 90687435965199 in words is "ninety trillion, six hundred eighty-seven billion, four hundred thirty-five million, nine hundred sixty-five thousand, one hundred ninety-nine".