391857132401 has 8 divisors (see below), whose sum is σ = 474180059520. Its totient is φ = 316120039488.

The previous prime is 391857132391. The next prime is 391857132427. The reversal of 391857132401 is 104231758193.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-391857132401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (391857132431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1646458421 + ... + 1646458658.

It is an arithmetic number, because the mean of its divisors is an integer number (59272507440).

Almost surely, 2^391857132401 is an apocalyptic number.

It is an amenable number.

391857132401 is a deficient number, since it is larger than the sum of its proper divisors (82322927119).

391857132401 is a wasteful number, since it uses less digits than its factorization.

391857132401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3292917103.

The product of its (nonzero) digits is 181440, while the sum is 44.

The spelling of 391857132401 in words is "three hundred ninety-one billion, eight hundred fifty-seven million, one hundred thirty-two thousand, four hundred one".