691411790744 has 8 divisors (see below), whose sum is σ = 1296397107660. Its totient is φ = 345705895368.

The previous prime is 691411790717. The next prime is 691411790767. The reversal of 691411790744 is 447097114196.

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, 43213236914 + ... + 43213236929.

Almost surely, 2^691411790744 is an apocalyptic number.

It is an amenable number.

691411790744 is a deficient number, since it is larger than the sum of its proper divisors (604985316916).

691411790744 is a wasteful number, since it uses less digits than its factorization.

691411790744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86426473849 (or 86426473845 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 53.

The spelling of 691411790744 in words is "six hundred ninety-one billion, four hundred eleven million, seven hundred ninety thousand, seven hundred forty-four".