691423898011 has 24 divisors (see below), whose sum is σ = 868808242400. Its totient is φ = 538621332480.

The previous prime is 691423898003. The next prime is 691423898029. The reversal of 691423898011 is 110898324196.

691423898011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 691423898011 - 2³ = 691423898003 is a prime.

It is a super-3 number, since 3×691423898011³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 691423898011.

It is not an unprimeable number, because it can be changed into a prime (691423898071) 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, 2968315 + ... + 3192763.

Almost surely, 2^691423898011 is an apocalyptic number.

691423898011 is a deficient number, since it is larger than the sum of its proper divisors (177384344389).

691423898011 is a wasteful number, since it uses less digits than its factorization.

691423898011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228115 (or 228104 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 52.

The spelling of 691423898011 in words is "six hundred ninety-one billion, four hundred twenty-three million, eight hundred ninety-eight thousand, eleven".