1617256272 has 20 divisors (see below), whose sum is σ = 4177912160. Its totient is φ = 539085408.

The previous prime is 1617256261. The next prime is 1617256297. The reversal of 1617256272 is 2726527161.

It is a self number, because there is not a number n which added to its sum of digits gives 1617256272.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16846372 + ... + 16846467.

It is an arithmetic number, because the mean of its divisors is an integer number (208895608).

Almost surely, 2^1617256272 is an apocalyptic number.

1617256272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1617256272 is an abundant number, since it is smaller than the sum of its proper divisors (2560655888).

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

1617256272 is a wasteful number, since it uses less digits than its factorization.

1617256272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33692850 (or 33692844 counting only the distinct ones).

The product of its digits is 70560, while the sum is 39.

The square root of 1617256272 is about 40215.1249158821. The cubic root of 1617256272 is about 1173.7968724909.

The spelling of 1617256272 in words is "one billion, six hundred seventeen million, two hundred fifty-six thousand, two hundred seventy-two".