391136640017 has 8 divisors (see below), whose sum is σ = 403235317056. Its totient is φ = 379118353392.

The previous prime is 391136639983. The next prime is 391136640049. The reversal of 391136640017 is 710046631193.

It is a happy number.

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 391136640017 - 2⁶ = 391136639953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (391136640077) 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, 20087723 + ... + 20107184.

It is an arithmetic number, because the mean of its divisors is an integer number (50404414632).

Almost surely, 2^391136640017 is an apocalyptic number.

391136640017 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

It is an amenable number.

391136640017 is a deficient number, since it is larger than the sum of its proper divisors (12098677039).

391136640017 is a wasteful number, since it uses less digits than its factorization.

391136640017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40195207.

The product of its (nonzero) digits is 81648, while the sum is 41.

The spelling of 391136640017 in words is "three hundred ninety-one billion, one hundred thirty-six million, six hundred forty thousand, seventeen".