90049777660 has 12 divisors (see below), whose sum is σ = 189104533128. Its totient is φ = 36019911056.

The previous prime is 90049777651. The next prime is 90049777661. The reversal of 90049777660 is 6677794009.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90049777661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2251244422 + ... + 2251244461.

It is an arithmetic number, because the mean of its divisors is an integer number (15758711094).

Almost surely, 2^90049777660 is an apocalyptic number.

It is an amenable number.

90049777660 is an abundant number, since it is smaller than the sum of its proper divisors (99054755468).

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

90049777660 is a wasteful number, since it uses less digits than its factorization.

90049777660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4502488892 (or 4502488890 counting only the distinct ones).

The product of its (nonzero) digits is 4000752, while the sum is 55.

The spelling of 90049777660 in words is "ninety billion, forty-nine million, seven hundred seventy-seven thousand, six hundred sixty".