90777328481 has 8 divisors (see below), whose sum is σ = 103761878784. Its totient is φ = 77796868320.

The previous prime is 90777328417. The next prime is 90777328493. The reversal of 90777328481 is 18482377709.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90777328481 - 2⁶ = 90777328417 is a prime.

It is a super-2 number, since 2×90777328481² (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 (90777325481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 974825 + ... + 1063878.

It is an arithmetic number, because the mean of its divisors is an integer number (12970234848).

Almost surely, 2^90777328481 is an apocalyptic number.

It is an amenable number.

90777328481 is a deficient number, since it is larger than the sum of its proper divisors (12984550303).

90777328481 is a wasteful number, since it uses less digits than its factorization.

90777328481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2045071.

The product of its (nonzero) digits is 4741632, while the sum is 56.

The spelling of 90777328481 in words is "ninety billion, seven hundred seventy-seven million, three hundred twenty-eight thousand, four hundred eighty-one".