997790848516 has 24 divisors (see below), whose sum is σ = 2176998215616. Its totient is φ = 388749681120.

The previous prime is 997790848513. The next prime is 997790848603. The reversal of 997790848516 is 615848097799.

It is not an unprimeable number, because it can be changed into a prime (997790848513) 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, 1619790031 + ... + 1619790646.

It is an arithmetic number, because the mean of its divisors is an integer number (90708258984).

Almost surely, 2^997790848516 is an apocalyptic number.

It is an amenable number.

997790848516 is an abundant number, since it is smaller than the sum of its proper divisors (1179207367100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

997790848516 is a wasteful number, since it uses less digits than its factorization.

997790848516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3239580699 (or 3239580697 counting only the distinct ones).

The product of its (nonzero) digits is 274337280, while the sum is 73.

The spelling of 997790848516 in words is "nine hundred ninety-seven billion, seven hundred ninety million, eight hundred forty-eight thousand, five hundred sixteen".