90912958681 has 16 divisors (see below), whose sum is σ = 92079218880. Its totient is φ = 89755061760.

The previous prime is 90912958651. The next prime is 90912958691. The reversal of 90912958681 is 18685921909.

It is a cyclic number.

It is not a de Polignac number, because 90912958681 - 2¹¹ = 90912956633 is a prime.

It is a super-2 number, since 2×90912958681² (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 (90912958651) 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 15 ways as a sum of consecutive naturals, for example, 24312910 + ... + 24316648.

It is an arithmetic number, because the mean of its divisors is an integer number (5754951180).

Almost surely, 2^90912958681 is an apocalyptic number.

It is an amenable number.

90912958681 is a deficient number, since it is larger than the sum of its proper divisors (1166260199).

90912958681 is a wasteful number, since it uses less digits than its factorization.

90912958681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4776.

The product of its (nonzero) digits is 2799360, while the sum is 58.

The spelling of 90912958681 in words is "ninety billion, nine hundred twelve million, nine hundred fifty-eight thousand, six hundred eighty-one".