16721055711 has 6 divisors (see below), whose sum is σ = 24152636040. Its totient is φ = 11147370468.

The previous prime is 16721055667. The next prime is 16721055719. The reversal of 16721055711 is 11755012761.

It is a happy number.

16721055711 is a `hidden beast` number, since 1 + 6 + 72 + 10 + 5 + 571 + 1 = 666.

It is not a de Polignac number, because 16721055711 - 2¹¹ = 16721053663 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16721055719) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 928947531 + ... + 928947548.

It is an arithmetic number, because the mean of its divisors is an integer number (4025439340).

Almost surely, 2^16721055711 is an apocalyptic number.

16721055711 is a deficient number, since it is larger than the sum of its proper divisors (7431580329).

16721055711 is a wasteful number, since it uses less digits than its factorization.

16721055711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1857895085 (or 1857895082 counting only the distinct ones).

The product of its (nonzero) digits is 14700, while the sum is 36.

The spelling of 16721055711 in words is "sixteen billion, seven hundred twenty-one million, fifty-five thousand, seven hundred eleven".