90745838840 has 64 divisors (see below), whose sum is σ = 216677345760. Its totient is φ = 34085908480.

The previous prime is 90745838741. The next prime is 90745838923. The reversal of 90745838840 is 4883854709.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150620 + ... + 451860.

Almost surely, 2^90745838840 is an apocalyptic number.

It is a pronic number, being equal to 301240×301241.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90745838840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108338672880).

90745838840 is an abundant number, since it is smaller than the sum of its proper divisors (125931506920).

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

90745838840 is a wasteful number, since it uses less digits than its factorization.

90745838840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301712 (or 301708 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 56.

The spelling of 90745838840 in words is "ninety billion, seven hundred forty-five million, eight hundred thirty-eight thousand, eight hundred forty".