797561688 has 64 divisors (see below), whose sum is σ = 2485912320. Its totient is φ = 207158400.

The previous prime is 797561671. The next prime is 797561693. The reversal of 797561688 is 886165797.

It is a super-2 number, since 2×797561688² = 1272209292330818688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 213943 + ... + 217638.

It is an arithmetic number, because the mean of its divisors is an integer number (38842380).

Almost surely, 2^797561688 is an apocalyptic number.

It is an amenable number.

797561688 is an abundant number, since it is smaller than the sum of its proper divisors (1688350632).

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

797561688 is a wasteful number, since it uses less digits than its factorization.

797561688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431608 (or 431604 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 57.

The square root of 797561688 is about 28241.1346797539. The cubic root of 797561688 is about 927.3736700917.

The spelling of 797561688 in words is "seven hundred ninety-seven million, five hundred sixty-one thousand, six hundred eighty-eight".