90679330081 has 4 divisors (see below), whose sum is σ = 90798488964. Its totient is φ = 90560171200.

The previous prime is 90679330051. The next prime is 90679330117. The reversal of 90679330081 is 18003397609.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18003397609 = 67 ⋅268707427.

It can be written as a sum of positive squares in 2 ways, for example, as 33944377600 + 56734952481 = 184240^2 + 238191^2 .

It is a cyclic number.

It is not a de Polignac number, because 90679330081 - 2⁷ = 90679329953 is a prime.

It is a super-2 number, since 2×90679330081² (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 (90679330051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59578300 + ... + 59579821.

It is an arithmetic number, because the mean of its divisors is an integer number (22699622241).

Almost surely, 2^90679330081 is an apocalyptic number.

It is an amenable number.

90679330081 is a deficient number, since it is larger than the sum of its proper divisors (119158883).

90679330081 is a wasteful number, since it uses less digits than its factorization.

90679330081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119158882.

The product of its (nonzero) digits is 244944, while the sum is 46.

The spelling of 90679330081 in words is "ninety billion, six hundred seventy-nine million, three hundred thirty thousand, eighty-one".