90745057782 has 32 divisors (see below), whose sum is σ = 201716121600. Its totient is φ = 30239286984.

The previous prime is 90745057771. The next prime is 90745057789. The reversal of 90745057782 is 28775054709.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90745057789) 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 15 ways as a sum of consecutive naturals, for example, 68758 + ... + 431529.

It is an arithmetic number, because the mean of its divisors is an integer number (6303628800).

Almost surely, 2^90745057782 is an apocalyptic number.

90745057782 is an abundant number, since it is smaller than the sum of its proper divisors (110971063818).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90745057782 is a wasteful number, since it uses less digits than its factorization.

90745057782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503657 (or 503651 counting only the distinct ones).

The product of its (nonzero) digits is 4939200, while the sum is 54.

The spelling of 90745057782 in words is "ninety billion, seven hundred forty-five million, fifty-seven thousand, seven hundred eighty-two".