90042552777 has 16 divisors (see below), whose sum is σ = 129596480640. Its totient is φ = 55438492032.

The previous prime is 90042552757. The next prime is 90042552779. The reversal of 90042552777 is 77725524009.

It is a happy number.

It is not a de Polignac number, because 90042552777 - 2²³ = 90034164169 is a prime.

It is a super-2 number, since 2×90042552777² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90042552779) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22497388 + ... + 22501389.

It is an arithmetic number, because the mean of its divisors is an integer number (8099780040).

Almost surely, 2^90042552777 is an apocalyptic number.

It is an amenable number.

90042552777 is a deficient number, since it is larger than the sum of its proper divisors (39553927863).

90042552777 is a wasteful number, since it uses less digits than its factorization.

90042552777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44998832.

The product of its (nonzero) digits is 1234800, while the sum is 48.

The spelling of 90042552777 in words is "ninety billion, forty-two million, five hundred fifty-two thousand, seven hundred seventy-seven".