1611631552 has 56 divisors (see below), whose sum is σ = 3392241120. Its totient is φ = 757063680.

The previous prime is 1611631523. The next prime is 1611631577. The reversal of 1611631552 is 2551361161.

It is a happy number.

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, 879277 + ... + 881107.

Almost surely, 2^1611631552 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 1611631552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1696120560).

1611631552 is an abundant number, since it is smaller than the sum of its proper divisors (1780609568).

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

1611631552 is a wasteful number, since it uses less digits than its factorization.

1611631552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2669 (or 2659 counting only the distinct ones).

The product of its digits is 5400, while the sum is 31.

The square root of 1611631552 is about 40145.1311120041. The cubic root of 1611631552 is about 1172.4344935466.

The spelling of 1611631552 in words is "one billion, six hundred eleven million, six hundred thirty-one thousand, five hundred fifty-two".