90764708121 has 6 divisors (see below), whose sum is σ = 131104578410. Its totient is φ = 60509805408.

The previous prime is 90764708093. The next prime is 90764708131. The reversal of 90764708121 is 12180746709.

It is a happy number.

90764708121 is a `hidden beast` number, since 90 + 76 + 470 + 8 + 1 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 84497769225 + 6266938896 = 290685^2 + 79164^2 .

It is not a de Polignac number, because 90764708121 - 2¹⁸ = 90764445977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90764708131) 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 5 ways as a sum of consecutive naturals, for example, 5042483776 + ... + 5042483793.

Almost surely, 2^90764708121 is an apocalyptic number.

It is an amenable number.

90764708121 is a deficient number, since it is larger than the sum of its proper divisors (40339870289).

90764708121 is a wasteful number, since it uses less digits than its factorization.

90764708121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10084967575 (or 10084967572 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 45.

The spelling of 90764708121 in words is "ninety billion, seven hundred sixty-four million, seven hundred eight thousand, one hundred twenty-one".