391253898633920 has 1792 divisors, whose sum is σ = 1236935309524992. Its totient is φ = 114713383403520.

The previous prime is 391253898633911. The next prime is 391253898633931. The reversal of 391253898633920 is 29336898352193.

It is a super-2 number, since 2×391253898633920² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 608481957119 + ... + 608481957761.

It is an arithmetic number, because the mean of its divisors is an integer number (690254078976).

Almost surely, 2^{391253898633920} 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 391253898633920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (618467654762496).

391253898633920 is an abundant number, since it is smaller than the sum of its proper divisors (845681410891072).

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

391253898633920 is a wasteful number, since it uses less digits than its factorization.

391253898633920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1118 (or 1108 counting only the distinct ones).

The product of its (nonzero) digits is 453496320, while the sum is 71.

The spelling of 391253898633920 in words is "three hundred ninety-one trillion, two hundred fifty-three billion, eight hundred ninety-eight million, six hundred thirty-three thousand, nine hundred twenty".