691346964609 has 24 divisors (see below), whose sum is σ = 1141375215552. Its totient is φ = 395019396000.

The previous prime is 691346964601. The next prime is 691346964613. The reversal of 691346964609 is 906469643196.

691346964609 is a `hidden beast` number, since 6 + 9 + 13 + 4 + 6 + 9 + 6 + 4 + 609 = 666.

It is not a de Polignac number, because 691346964609 - 2³ = 691346964601 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (691346964601) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 204234 + ... + 1193484.

It is an arithmetic number, because the mean of its divisors is an integer number (47557300648).

Almost surely, 2^691346964609 is an apocalyptic number.

It is an amenable number.

691346964609 is a deficient number, since it is larger than the sum of its proper divisors (450028250943).

691346964609 is a wasteful number, since it uses less digits than its factorization.

691346964609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000357 (or 1000354 counting only the distinct ones).

The product of its (nonzero) digits is 45349632, while the sum is 63.

The spelling of 691346964609 in words is "six hundred ninety-one billion, three hundred forty-six million, nine hundred sixty-four thousand, six hundred nine".