90043978702 has 16 divisors (see below), whose sum is σ = 139154027040. Its totient is φ = 43666980768.

The previous prime is 90043978699. The next prime is 90043978709. The reversal of 90043978702 is 20787934009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90043978709) 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 7 ways as a sum of consecutive naturals, for example, 1895802 + ... + 1942717.

It is an arithmetic number, because the mean of its divisors is an integer number (8697126690).

Almost surely, 2^90043978702 is an apocalyptic number.

90043978702 is a deficient number, since it is larger than the sum of its proper divisors (49110048338).

90043978702 is a wasteful number, since it uses less digits than its factorization.

90043978702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3838875.

The product of its (nonzero) digits is 762048, while the sum is 49.

The spelling of 90043978702 in words is "ninety billion, forty-three million, nine hundred seventy-eight thousand, seven hundred two".