997962806808 has 48 divisors (see below), whose sum is σ = 2948526477000. Its totient is φ = 302412971520.

The previous prime is 997962806779. The next prime is 997962806809. The reversal of 997962806808 is 808608269799.

It is a super-2 number, since 2×997962806808² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997962806809) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 630026233 + ... + 630027816.

Almost surely, 2^997962806808 is an apocalyptic number.

It is an amenable number.

997962806808 is an abundant number, since it is smaller than the sum of its proper divisors (1950563670192).

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

997962806808 is a wasteful number, since it uses less digits than its factorization.

997962806808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1260054072 (or 1260054065 counting only the distinct ones).

The product of its (nonzero) digits is 188116992, while the sum is 72.

The spelling of 997962806808 in words is "nine hundred ninety-seven billion, nine hundred sixty-two million, eight hundred six thousand, eight hundred eight".