391347542032 has 10 divisors (see below), whose sum is σ = 758235862718. Its totient is φ = 195673771008.

The previous prime is 391347542017. The next prime is 391347542063. The reversal of 391347542032 is 230245743193.

It can be written as a sum of positive squares in only one way, i.e., 381582940176 + 9764601856 = 617724^2 + 98816^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 391347542032.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12229610673 + ... + 12229610704.

Almost surely, 2^391347542032 is an apocalyptic number.

It is an amenable number.

391347542032 is a deficient number, since it is larger than the sum of its proper divisors (366888320686).

391347542032 is a wasteful number, since it uses less digits than its factorization.

391347542032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24459221385 (or 24459221379 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 43.

The spelling of 391347542032 in words is "three hundred ninety-one billion, three hundred forty-seven million, five hundred forty-two thousand, thirty-two".