391539755879552 has 1024 divisors, whose sum is σ = 1054941511680000. Its totient is φ = 143632757882880.

The previous prime is 391539755879387. The next prime is 391539755879599. The reversal of 391539755879552 is 255978557935193.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 55830561998 + ... + 55830569010.

It is an arithmetic number, because the mean of its divisors is an integer number (1030216320000).

Almost surely, 2^{391539755879552} is an apocalyptic number.

391539755879552 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 391539755879552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (527470755840000).

391539755879552 is an abundant number, since it is smaller than the sum of its proper divisors (663401755800448).

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

391539755879552 is a wasteful number, since it uses less digits than its factorization.

391539755879552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7242 (or 7216 counting only the distinct ones).

The product of its digits is 16074450000, while the sum is 83.

The spelling of 391539755879552 in words is "three hundred ninety-one trillion, five hundred thirty-nine billion, seven hundred fifty-five million, eight hundred seventy-nine thousand, five hundred fifty-two".