691077960993 has 64 divisors (see below), whose sum is σ = 1112143104000. Its totient is φ = 381103732800.

The previous prime is 691077960931. The next prime is 691077961003. The reversal of 691077960993 is 399069770196.

It is not a de Polignac number, because 691077960993 - 2¹² = 691077956897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (691077960593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 85072630 + ... + 85080752.

It is an arithmetic number, because the mean of its divisors is an integer number (17377236000).

Almost surely, 2^691077960993 is an apocalyptic number.

It is an amenable number.

691077960993 is a deficient number, since it is larger than the sum of its proper divisors (421065143007).

691077960993 is a wasteful number, since it uses less digits than its factorization.

691077960993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11027 (or 11013 counting only the distinct ones).

The product of its (nonzero) digits is 34720812, while the sum is 66.

The spelling of 691077960993 in words is "six hundred ninety-one billion, seventy-seven million, nine hundred sixty thousand, nine hundred ninety-three".