90975860454868 has 6 divisors (see below), whose sum is σ = 159207755796026. Its totient is φ = 45487930227432.

The previous prime is 90975860454863. The next prime is 90975860454929. The reversal of 90975860454868 is 86845406857909.

It can be written as a sum of positive squares in only one way, i.e., 86812228366864 + 4163632088004 = 9317308^2 + 2040498^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90975860454863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11371982556855 + ... + 11371982556862.

Almost surely, 2^{90975860454868} is an apocalyptic number.

It is an amenable number.

90975860454868 is a deficient number, since it is larger than the sum of its proper divisors (68231895341158).

90975860454868 is a wasteful number, since it uses less digits than its factorization.

90975860454868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22743965113721 (or 22743965113719 counting only the distinct ones).

The product of its (nonzero) digits is 4180377600, while the sum is 79.

The spelling of 90975860454868 in words is "ninety trillion, nine hundred seventy-five billion, eight hundred sixty million, four hundred fifty-four thousand, eight hundred sixty-eight".