697952320561 has 4 divisors (see below), whose sum is σ = 697954787392. Its totient is φ = 697949853732.

The previous prime is 697952320517. The next prime is 697952320601. The reversal of 697952320561 is 165023259796.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 697952320561 - 2¹¹ = 697952318513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (697952320511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 744381 + ... + 1396426.

It is an arithmetic number, because the mean of its divisors is an integer number (174488696848).

Almost surely, 2^697952320561 is an apocalyptic number.

It is an amenable number.

697952320561 is a deficient number, since it is larger than the sum of its proper divisors (2466831).

697952320561 is a wasteful number, since it uses less digits than its factorization.

697952320561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2466830.

The product of its (nonzero) digits is 6123600, while the sum is 55.

The spelling of 697952320561 in words is "six hundred ninety-seven billion, nine hundred fifty-two million, three hundred twenty thousand, five hundred sixty-one".