90555078759 has 4 divisors (see below), whose sum is σ = 120740105016. Its totient is φ = 60370052504.

The previous prime is 90555078743. The next prime is 90555078787. The reversal of 90555078759 is 95787055509.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90555078759 - 2⁴ = 90555078743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90555078799) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15092513124 + ... + 15092513129.

It is an arithmetic number, because the mean of its divisors is an integer number (30185026254).

Almost surely, 2^90555078759 is an apocalyptic number.

90555078759 is a deficient number, since it is larger than the sum of its proper divisors (30185026257).

90555078759 is a wasteful number, since it uses less digits than its factorization.

90555078759 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30185026256.

The product of its (nonzero) digits is 19845000, while the sum is 60.

The spelling of 90555078759 in words is "ninety billion, five hundred fifty-five million, seventy-eight thousand, seven hundred fifty-nine".