997911335915 has 8 divisors (see below), whose sum is σ = 1289608495728. Its totient is φ = 736919140320.

The previous prime is 997911335899. The next prime is 997911335917. The reversal of 997911335915 is 519533119799.

997911335915 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 997911335915 - 2⁴ = 997911335899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (997911335917) 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, 7676240981 + ... + 7676241110.

It is an arithmetic number, because the mean of its divisors is an integer number (161201061966).

Almost surely, 2^997911335915 is an apocalyptic number.

997911335915 is a deficient number, since it is larger than the sum of its proper divisors (291697159813).

997911335915 is a wasteful number, since it uses less digits than its factorization.

997911335915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15352482109.

The product of its digits is 10333575, while the sum is 62.

The spelling of 997911335915 in words is "nine hundred ninety-seven billion, nine hundred eleven million, three hundred thirty-five thousand, nine hundred fifteen".