16256506739 has 18 divisors (see below), whose sum is σ = 18244191924. Its totient is φ = 14365380240.

The previous prime is 16256506727. The next prime is 16256506757. The reversal of 16256506739 is 93760565261.

It is a happy number.

It is not a de Polignac number, because 16256506739 - 2¹⁶ = 16256441203 is a prime.

It is a super-2 number, since 2×16256506739² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16256506339) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 15645782 + ... + 15646820.

It is an arithmetic number, because the mean of its divisors is an integer number (1013566218).

Almost surely, 2^16256506739 is an apocalyptic number.

16256506739 is a deficient number, since it is larger than the sum of its proper divisors (1987685185).

16256506739 is an frugal number, since it uses more digits than its factorization.

16256506739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2163 (or 1087 counting only the distinct ones).

The product of its (nonzero) digits is 2041200, while the sum is 50.

The spelling of 16256506739 in words is "sixteen billion, two hundred fifty-six million, five hundred six thousand, seven hundred thirty-nine".