2371399817991 has 8 divisors (see below), whose sum is σ = 3238985117424. Its totient is φ = 1542373865280.

The previous prime is 2371399817981. The next prime is 2371399818043. The reversal of 2371399817991 is 1997189931732.

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

It is not a de Polignac number, because 2371399817991 - 2⁷ = 2371399817863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2371399817971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9639836536 + ... + 9639836781.

It is an arithmetic number, because the mean of its divisors is an integer number (404873139678).

Almost surely, 2^{2371399817991} is an apocalyptic number.

2371399817991 is a deficient number, since it is larger than the sum of its proper divisors (867585299433).

2371399817991 is a wasteful number, since it uses less digits than its factorization.

2371399817991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19279673361.

The product of its digits is 46294416, while the sum is 69.

The spelling of 2371399817991 in words is "two trillion, three hundred seventy-one billion, three hundred ninety-nine million, eight hundred seventeen thousand, nine hundred ninety-one".