90155336771 has 4 divisors (see below), whose sum is σ = 90348389352. Its totient is φ = 89962284192.

The previous prime is 90155336767. The next prime is 90155336809. The reversal of 90155336771 is 17763355109.

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 90155336771 - 2² = 90155336767 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90155336701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96525590 + ... + 96526523.

It is an arithmetic number, because the mean of its divisors is an integer number (22587097338).

Almost surely, 2^90155336771 is an apocalyptic number.

90155336771 is a deficient number, since it is larger than the sum of its proper divisors (193052581).

90155336771 is a wasteful number, since it uses less digits than its factorization.

90155336771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193052580.

The product of its (nonzero) digits is 595350, while the sum is 47.

The spelling of 90155336771 in words is "ninety billion, one hundred fifty-five million, three hundred thirty-six thousand, seven hundred seventy-one".