697395643506 has 32 divisors (see below), whose sum is σ = 1555660782720. Its totient is φ = 231581311632.

The previous prime is 697395643493. The next prime is 697395643517. The reversal of 697395643506 is 605346593796.

697395643506 is a `hidden beast` number, since 6 + 9 + 7 + 39 + 56 + 43 + 506 = 666.

It is a super-2 number, since 2×697395643506² (a number of 24 digits) contains 22 as substring.

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, 24538525 + ... + 24566928.

It is an arithmetic number, because the mean of its divisors is an integer number (48614399460).

Almost surely, 2^697395643506 is an apocalyptic number.

697395643506 is an abundant number, since it is smaller than the sum of its proper divisors (858265139214).

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

697395643506 is a wasteful number, since it uses less digits than its factorization.

697395643506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49105727 (or 49105721 counting only the distinct ones).

The product of its (nonzero) digits is 110224800, while the sum is 63.

The spelling of 697395643506 in words is "six hundred ninety-seven billion, three hundred ninety-five million, six hundred forty-three thousand, five hundred six".