997146789864 has 32 divisors (see below), whose sum is σ = 2527977781440. Its totient is φ = 327700822400.

The previous prime is 997146789841. The next prime is 997146789887. The reversal of 997146789864 is 468987641799.

It is an interprime number because it is at equal distance from previous prime (997146789841) and next prime (997146789887).

It is a self number, because there is not a number n which added to its sum of digits gives 997146789864.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 292588317 + ... + 292591724.

It is an arithmetic number, because the mean of its divisors is an integer number (78999305670).

Almost surely, 2^997146789864 is an apocalyptic number.

It is an amenable number.

997146789864 is an abundant number, since it is smaller than the sum of its proper divisors (1530830991576).

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

997146789864 is a wasteful number, since it uses less digits than its factorization.

997146789864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585180121 (or 585180117 counting only the distinct ones).

The product of its digits is 1316818944, while the sum is 78.

The spelling of 997146789864 in words is "nine hundred ninety-seven billion, one hundred forty-six million, seven hundred eighty-nine thousand, eight hundred sixty-four".