90909146465 has 8 divisors (see below), whose sum is σ = 109107662568. Its totient is φ = 72716192640.

The previous prime is 90909146417. The next prime is 90909146491. The reversal of 90909146465 is 56464190909.

It can be written as a sum of positive squares in 4 ways, for example, as 14505552721 + 76403593744 = 120439^2 + 276412^2 .

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

It is not a de Polignac number, because 90909146465 - 2¹⁰ = 90909145441 is a prime.

It is a Duffinian number.

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, 1354526 + ... + 1420055.

It is an arithmetic number, because the mean of its divisors is an integer number (13638457821).

Almost surely, 2^90909146465 is an apocalyptic number.

It is an amenable number.

90909146465 is a deficient number, since it is larger than the sum of its proper divisors (18198516103).

90909146465 is a wasteful number, since it uses less digits than its factorization.

90909146465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2781139.

The product of its (nonzero) digits is 2099520, while the sum is 53.

The spelling of 90909146465 in words is "ninety billion, nine hundred nine million, one hundred forty-six thousand, four hundred sixty-five".