6991465065023 has 4 divisors (see below), whose sum is σ = 6991569201288. Its totient is φ = 6991360928760.

The previous prime is 6991465064981. The next prime is 6991465065059. The reversal of 6991465065023 is 3205605641996.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6991465065023 - 2²⁸ = 6991196629567 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6991465065023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6991465065523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51967361 + ... + 52101722.

It is an arithmetic number, because the mean of its divisors is an integer number (1747892300322).

Almost surely, 2^{6991465065023} is an apocalyptic number.

6991465065023 is a deficient number, since it is larger than the sum of its proper divisors (104136265).

6991465065023 is a wasteful number, since it uses less digits than its factorization.

6991465065023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104136264.

The product of its (nonzero) digits is 10497600, while the sum is 56.

The spelling of 6991465065023 in words is "six trillion, nine hundred ninety-one billion, four hundred sixty-five million, sixty-five thousand, twenty-three".