391268395377 has 20 divisors (see below), whose sum is σ = 587039730420. Its totient is φ = 259706520864.

The previous prime is 391268395361. The next prime is 391268395381. The reversal of 391268395377 is 773593862193.

391268395377 is a `hidden beast` number, since 3 + 9 + 1 + 2 + 68 + 39 + 537 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 243104219136 + 148164176241 = 493056^2 + 384921^2 .

It is not a de Polignac number, because 391268395377 - 2⁴ = 391268395361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (391268395327) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10528338 + ... + 10565435.

It is an arithmetic number, because the mean of its divisors is an integer number (29351986521).

Almost surely, 2^391268395377 is an apocalyptic number.

It is an amenable number.

391268395377 is a deficient number, since it is larger than the sum of its proper divisors (195771335043).

391268395377 is a wasteful number, since it uses less digits than its factorization.

391268395377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21094014 (or 21094005 counting only the distinct ones).

The product of its digits is 51438240, while the sum is 63.

The spelling of 391268395377 in words is "three hundred ninety-one billion, two hundred sixty-eight million, three hundred ninety-five thousand, three hundred seventy-seven".