997479974799 has 48 divisors (see below), whose sum is σ = 1830220614144. Its totient is φ = 508394577600.

The previous prime is 997479974791. The next prime is 997479974819.

997479974799 is a `hidden beast` number, since 9 + 9 + 7 + 47 + 9 + 97 + 479 + 9 = 666.

997479974799 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 997479974799 - 2³ = 997479974791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997479974791) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13542187 + ... + 13615644.

It is an arithmetic number, because the mean of its divisors is an integer number (38129596128).

Almost surely, 2^997479974799 is an apocalyptic number.

997479974799 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

997479974799 is a deficient number, since it is larger than the sum of its proper divisors (832740639345).

997479974799 is a wasteful number, since it uses less digits than its factorization.

997479974799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27157908 (or 27157905 counting only the distinct ones).

The product of its digits is 20415837456, while the sum is 90.

The spelling of 997479974799 in words is "nine hundred ninety-seven billion, four hundred seventy-nine million, nine hundred seventy-four thousand, seven hundred ninety-nine".