90861886250 has 80 divisors (see below), whose sum is σ = 171616146504. Its totient is φ = 36067680000.

The previous prime is 90861886231. The next prime is 90861886277. The reversal of 90861886250 is 5268816809.

It can be written as a sum of positive squares in 20 ways, for example, as 29917583089 + 60944303161 = 172967^2 + 246869^2 .

It is a junction number, because it is equal to n+sod(n) for n = 90861886192 and 90861886201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 137460920 + ... + 137461580.

Almost surely, 2^90861886250 is an apocalyptic number.

90861886250 is a deficient number, since it is larger than the sum of its proper divisors (80754260254).

90861886250 is a wasteful number, since it uses less digits than its factorization.

90861886250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1357 (or 1342 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 53.

The spelling of 90861886250 in words is "ninety billion, eight hundred sixty-one million, eight hundred eighty-six thousand, two hundred fifty".