90943036865 has 4 divisors (see below), whose sum is σ = 109131644244. Its totient is φ = 72754429488.

The previous prime is 90943036859. The next prime is 90943036871. The reversal of 90943036865 is 56863034909.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56863034909 = 19 ⋅2992791311.

It is an interprime number because it is at equal distance from previous prime (90943036859) and next prime (90943036871).

It can be written as a sum of positive squares in 2 ways, for example, as 36430593424 + 54512443441 = 190868^2 + 233479^2 .

It is a cyclic number.

It is not a de Polignac number, because 90943036865 - 2³² = 86648069569 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9094303682 + ... + 9094303691.

It is an arithmetic number, because the mean of its divisors is an integer number (27282911061).

Almost surely, 2^90943036865 is an apocalyptic number.

It is an amenable number.

90943036865 is a deficient number, since it is larger than the sum of its proper divisors (18188607379).

90943036865 is a wasteful number, since it uses less digits than its factorization.

90943036865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18188607378.

The product of its (nonzero) digits is 4199040, while the sum is 53.

The spelling of 90943036865 in words is "ninety billion, nine hundred forty-three million, thirty-six thousand, eight hundred sixty-five".