16256278644 has 24 divisors (see below), whose sum is σ = 38299584960. Its totient is φ = 5366149824.

The previous prime is 16256278637. The next prime is 16256278651. The reversal of 16256278644 is 44687265261.

It is an interprime number because it is at equal distance from previous prime (16256278637) and next prime (16256278651).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6574929 + ... + 6577400.

It is an arithmetic number, because the mean of its divisors is an integer number (1595816040).

Almost surely, 2^16256278644 is an apocalyptic number.

It is an amenable number.

16256278644 is an abundant number, since it is smaller than the sum of its proper divisors (22043306316).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16256278644 is a wasteful number, since it uses less digits than its factorization.

16256278644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13152439 (or 13152437 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 51.

The spelling of 16256278644 in words is "sixteen billion, two hundred fifty-six million, two hundred seventy-eight thousand, six hundred forty-four".