697317620728 has 8 divisors (see below), whose sum is σ = 1307470538880. Its totient is φ = 348658810360.

The previous prime is 697317620693. The next prime is 697317620749. The reversal of 697317620728 is 827026713796.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43582351288 + ... + 43582351303.

It is an arithmetic number, because the mean of its divisors is an integer number (163433817360).

Almost surely, 2^697317620728 is an apocalyptic number.

It is an amenable number.

697317620728 is a deficient number, since it is larger than the sum of its proper divisors (610152918152).

697317620728 is a wasteful number, since it uses less digits than its factorization.

697317620728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87164702597 (or 87164702593 counting only the distinct ones).

The product of its (nonzero) digits is 10668672, while the sum is 58.

The spelling of 697317620728 in words is "six hundred ninety-seven billion, three hundred seventeen million, six hundred twenty thousand, seven hundred twenty-eight".