391481400499 has 8 divisors (see below), whose sum is σ = 448417267200. Its totient is φ = 334798021896.

The previous prime is 391481400461. The next prime is 391481400517. The reversal of 391481400499 is 994004184193.

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

It is a cyclic number.

It is not a de Polignac number, because 391481400499 - 2⁹ = 391481399987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (391481400599) 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, 63118699 + ... + 63124900.

It is an arithmetic number, because the mean of its divisors is an integer number (56052158400).

Almost surely, 2^391481400499 is an apocalyptic number.

391481400499 is a deficient number, since it is larger than the sum of its proper divisors (56935866701).

391481400499 is a wasteful number, since it uses less digits than its factorization.

391481400499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126244049.

The product of its (nonzero) digits is 1119744, while the sum is 52.

The spelling of 391481400499 in words is "three hundred ninety-one billion, four hundred eighty-one million, four hundred thousand, four hundred ninety-nine".