90409964136 has 32 divisors (see below), whose sum is σ = 233316038400. Its totient is φ = 29164504320.

The previous prime is 90409964129. The next prime is 90409964147. The reversal of 90409964136 is 63146990409.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60758641 + ... + 60760128.

It is an arithmetic number, because the mean of its divisors is an integer number (7291126200).

Almost surely, 2^90409964136 is an apocalyptic number.

It is an amenable number.

90409964136 is an abundant number, since it is smaller than the sum of its proper divisors (142906074264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90409964136 is a wasteful number, since it uses less digits than its factorization.

90409964136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121518809 (or 121518805 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 51.

The spelling of 90409964136 in words is "ninety billion, four hundred nine million, nine hundred sixty-four thousand, one hundred thirty-six".