16261813887 has 32 divisors (see below), whose sum is σ = 25066056960. Its totient is φ = 9283680000.

The previous prime is 16261813837. The next prime is 16261813889. The reversal of 16261813887 is 78831816261.

It is a happy number.

It is not a de Polignac number, because 16261813887 - 2⁷ = 16261813759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16261813889) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 167989 + ... + 246462.

It is an arithmetic number, because the mean of its divisors is an integer number (783314280).

Almost surely, 2^16261813887 is an apocalyptic number.

16261813887 is a deficient number, since it is larger than the sum of its proper divisors (8804243073).

16261813887 is a wasteful number, since it uses less digits than its factorization.

16261813887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414535.

The product of its digits is 774144, while the sum is 51.

The spelling of 16261813887 in words is "sixteen billion, two hundred sixty-one million, eight hundred thirteen thousand, eight hundred eighty-seven".