31161552998399 has 8 divisors (see below), whose sum is σ = 31265616256992. Its totient is φ = 31057514518240.

The previous prime is 31161552998357. The next prime is 31161552998417. The reversal of 31161552998399 is 99389925516113.

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 31161552998399 - 2⁸ = 31161552998143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31161552998309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3673484 + ... + 8707329.

It is an arithmetic number, because the mean of its divisors is an integer number (3908202032124).

Almost surely, 2^{31161552998399} is an apocalyptic number.

31161552998399 is a deficient number, since it is larger than the sum of its proper divisors (104063258593).

31161552998399 is a wasteful number, since it uses less digits than its factorization.

31161552998399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12389217.

The product of its digits is 141717600, while the sum is 71.

The spelling of 31161552998399 in words is "thirty-one trillion, one hundred sixty-one billion, five hundred fifty-two million, nine hundred ninety-eight thousand, three hundred ninety-nine".