997562788551 has 96 divisors (see below), whose sum is σ = 1680049280000. Its totient is φ = 558658197504.

The previous prime is 997562788513. The next prime is 997562788699. The reversal of 997562788551 is 155887265799.

997562788551 is a `hidden beast` number, since 9 + 9 + 7 + 5 + 62 + 7 + 8 + 8 + 551 = 666.

It is not a de Polignac number, because 997562788551 - 2¹³ = 997562780359 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 997562788551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997562788511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 314786295 + ... + 314789463.

Almost surely, 2^997562788551 is an apocalyptic number.

997562788551 is a deficient number, since it is larger than the sum of its proper divisors (682486491449).

997562788551 is a wasteful number, since it uses less digits than its factorization.

997562788551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3773 (or 3770 counting only the distinct ones).

The product of its digits is 381024000, while the sum is 72.

The spelling of 997562788551 in words is "nine hundred ninety-seven billion, five hundred sixty-two million, seven hundred eighty-eight thousand, five hundred fifty-one".