90525163877 has 4 divisors (see below), whose sum is σ = 90552995340. Its totient is φ = 90497332416.

The previous prime is 90525163853. The next prime is 90525163891. The reversal of 90525163877 is 77836152509.

It is a Cunningham number, because it is equal to 300874²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77836152509 = 9161 ⋅8496469.

It can be written as a sum of positive squares in 2 ways, for example, as 90080417956 + 444745921 = 300134^2 + 21089^2 .

It is a cyclic number.

It is not a de Polignac number, because 90525163877 - 2⁸ = 90525163621 is a prime.

It is a super-2 number, since 2×90525163877² (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 (90525163177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13910852 + ... + 13917357.

It is an arithmetic number, because the mean of its divisors is an integer number (22638248835).

Almost surely, 2^90525163877 is an apocalyptic number.

It is an amenable number.

90525163877 is a deficient number, since it is larger than the sum of its proper divisors (27831463).

90525163877 is a wasteful number, since it uses less digits than its factorization.

90525163877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27831462.

The product of its (nonzero) digits is 3175200, while the sum is 53.

The spelling of 90525163877 in words is "ninety billion, five hundred twenty-five million, one hundred sixty-three thousand, eight hundred seventy-seven".