391168431901 has 16 divisors (see below), whose sum is σ = 431750169648. Its totient is φ = 352094400000.

The previous prime is 391168431881. The next prime is 391168431919. The reversal of 391168431901 is 109134861193.

It can be written as a sum of positive squares in 8 ways, for example, as 172262352025 + 218906079876 = 415045^2 + 467874^2 .

It is a cyclic number.

It is not a de Polignac number, because 391168431901 - 2¹⁷ = 391168300829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391168431931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 880651 + ... + 1248151.

It is an arithmetic number, because the mean of its divisors is an integer number (26984385603).

Almost surely, 2^391168431901 is an apocalyptic number.

It is an amenable number.

391168431901 is a deficient number, since it is larger than the sum of its proper divisors (40581737747).

391168431901 is a wasteful number, since it uses less digits than its factorization.

391168431901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369552.

The product of its (nonzero) digits is 139968, while the sum is 46.

The spelling of 391168431901 in words is "three hundred ninety-one billion, one hundred sixty-eight million, four hundred thirty-one thousand, nine hundred one".