1611663256 has 32 divisors (see below), whose sum is σ = 3455677440. Its totient is φ = 690290208.

The previous prime is 1611663217. The next prime is 1611663259. The reversal of 1611663256 is 6523661161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1611663259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94195 + ... + 109981.

It is an arithmetic number, because the mean of its divisors is an integer number (107989920).

Almost surely, 2^1611663256 is an apocalyptic number.

It is an amenable number.

1611663256 is an abundant number, since it is smaller than the sum of its proper divisors (1844014184).

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

1611663256 is a wasteful number, since it uses less digits than its factorization.

1611663256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17623 (or 17619 counting only the distinct ones).

The product of its digits is 38880, while the sum is 37.

The square root of 1611663256 is about 40145.5259773739. The cubic root of 1611663256 is about 1172.4421815361.

The spelling of 1611663256 in words is "one billion, six hundred eleven million, six hundred sixty-three thousand, two hundred fifty-six".