90208865701 has 4 divisors (see below), whose sum is σ = 90209466400. Its totient is φ = 90208265004.

The previous prime is 90208865699. The next prime is 90208865737. The reversal of 90208865701 is 10756880209.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 90208865701 - 2¹ = 90208865699 is a prime.

It is a super-2 number, since 2×90208865701² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90208865771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148960 + ... + 450118.

It is an arithmetic number, because the mean of its divisors is an integer number (22552366600).

Almost surely, 2^90208865701 is an apocalyptic number.

It is an amenable number.

90208865701 is a deficient number, since it is larger than the sum of its proper divisors (600699).

90208865701 is a wasteful number, since it uses less digits than its factorization.

90208865701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600698.

The product of its (nonzero) digits is 241920, while the sum is 46.

The spelling of 90208865701 in words is "ninety billion, two hundred eight million, eight hundred sixty-five thousand, seven hundred one".