691000819311 has 16 divisors (see below), whose sum is σ = 1039750450560. Its totient is φ = 404347396320.

The previous prime is 691000819219. The next prime is 691000819321. The reversal of 691000819311 is 113918000196.

It is not a de Polignac number, because 691000819311 - 2¹⁴ = 691000802927 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 691000819311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (691000819321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 361023505 + ... + 361025418.

It is an arithmetic number, because the mean of its divisors is an integer number (64984403160).

Almost surely, 2^691000819311 is an apocalyptic number.

691000819311 is a deficient number, since it is larger than the sum of its proper divisors (348749631249).

691000819311 is a wasteful number, since it uses less digits than its factorization.

691000819311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722048966.

The product of its (nonzero) digits is 11664, while the sum is 39.

The spelling of 691000819311 in words is "six hundred ninety-one billion, eight hundred nineteen thousand, three hundred eleven".