90771140745 has 24 divisors (see below), whose sum is σ = 157701727872. Its totient is φ = 48298941600.

The previous prime is 90771140743. The next prime is 90771140767. The reversal of 90771140745 is 54704117709.

It is not a de Polignac number, because 90771140745 - 2¹ = 90771140743 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 90771140745.

It is not an unprimeable number, because it can be changed into a prime (90771140743) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2320671 + ... + 2359460.

It is an arithmetic number, because the mean of its divisors is an integer number (6570905328).

Almost surely, 2^90771140745 is an apocalyptic number.

It is an amenable number.

90771140745 is a deficient number, since it is larger than the sum of its proper divisors (66930587127).

90771140745 is a wasteful number, since it uses less digits than its factorization.

90771140745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4680573 (or 4680570 counting only the distinct ones).

The product of its (nonzero) digits is 246960, while the sum is 45.

The spelling of 90771140745 in words is "ninety billion, seven hundred seventy-one million, one hundred forty thousand, seven hundred forty-five".