16488400685 has 16 divisors (see below), whose sum is σ = 19897924800. Its totient is φ = 13116370176.

The previous prime is 16488400673. The next prime is 16488400699. The reversal of 16488400685 is 58600488461.

It is a cyclic number.

It is not a de Polignac number, because 16488400685 - 2²⁰ = 16487352109 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 625706 + ... + 651524.

It is an arithmetic number, because the mean of its divisors is an integer number (1243620300).

Almost surely, 2^16488400685 is an apocalyptic number.

It is an amenable number.

16488400685 is a deficient number, since it is larger than the sum of its proper divisors (3409524115).

16488400685 is a wasteful number, since it uses less digits than its factorization.

16488400685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26540.

The product of its (nonzero) digits is 1474560, while the sum is 50.

The spelling of 16488400685 in words is "sixteen billion, four hundred eighty-eight million, four hundred thousand, six hundred eighty-five".