1611013656 has 128 divisors (see below), whose sum is σ = 4920652800. Its totient is φ = 429496320.

The previous prime is 1611013639. The next prime is 1611013681. The reversal of 1611013656 is 6563101161.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 153340 + ... + 163508.

It is an arithmetic number, because the mean of its divisors is an integer number (38442600).

Almost surely, 2^1611013656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1611013656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2460326400).

1611013656 is an abundant number, since it is smaller than the sum of its proper divisors (3309639144).

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

1611013656 is a wasteful number, since it uses less digits than its factorization.

1611013656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10249 (or 10245 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 1611013656 is about 40137.4345966456. The cubic root of 1611013656 is about 1172.2846381230.

The spelling of 1611013656 in words is "one billion, six hundred eleven million, thirteen thousand, six hundred fifty-six".