391172481375 has 128 divisors (see below), whose sum is σ = 711314472960. Its totient is φ = 189758822400.

The previous prime is 391172481367. The next prime is 391172481407. The reversal of 391172481375 is 573184271193.

It is not a de Polignac number, because 391172481375 - 2³ = 391172481367 is a prime.

It is a congruent number.

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, 98604642 + ... + 98608608.

It is an arithmetic number, because the mean of its divisors is an integer number (5557144320).

Almost surely, 2^391172481375 is an apocalyptic number.

391172481375 is a deficient number, since it is larger than the sum of its proper divisors (320141991585).

391172481375 is a wasteful number, since it uses less digits than its factorization.

391172481375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4290 (or 4280 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 51.

The spelling of 391172481375 in words is "three hundred ninety-one billion, one hundred seventy-two million, four hundred eighty-one thousand, three hundred seventy-five".