90755399281 has 4 divisors (see below), whose sum is σ = 91691022052. Its totient is φ = 89819776512.

The previous prime is 90755399279. The next prime is 90755399303. The reversal of 90755399281 is 18299355709.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16558542400 + 74196856881 = 128680^2 + 272391^2 .

It is a cyclic number.

It is not a de Polignac number, because 90755399281 - 2¹ = 90755399279 is a prime.

It is a super-2 number, since 2×90755399281² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90755399381) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 467811240 + ... + 467811433.

It is an arithmetic number, because the mean of its divisors is an integer number (22922755513).

Almost surely, 2^90755399281 is an apocalyptic number.

It is an amenable number.

90755399281 is a deficient number, since it is larger than the sum of its proper divisors (935622771).

90755399281 is an equidigital number, since it uses as much as digits as its factorization.

90755399281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 935622770.

The product of its (nonzero) digits is 6123600, while the sum is 58.

The spelling of 90755399281 in words is "ninety billion, seven hundred fifty-five million, three hundred ninety-nine thousand, two hundred eighty-one".