90391078644240 has 320 divisors, whose sum is σ = 314009774088192. Its totient is φ = 21316549478400.

The previous prime is 90391078644239. The next prime is 90391078644253. The reversal of 90391078644240 is 4244687019309.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 510875629 + ... + 511052531.

Almost surely, 2^{90391078644240} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90391078644240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157004887044096).

90391078644240 is an abundant number, since it is smaller than the sum of its proper divisors (223618695443952).

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

90391078644240 is a wasteful number, since it uses less digits than its factorization.

90391078644240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182198 (or 182192 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 57.

The spelling of 90391078644240 in words is "ninety trillion, three hundred ninety-one billion, seventy-eight million, six hundred forty-four thousand, two hundred forty".