3551691312 has 120 divisors (see below), whose sum is σ = 10745437248. Its totient is φ = 1088640000.

The previous prime is 3551691229. The next prime is 3551691313. The reversal of 3551691312 is 2131961553.

It is a happy number.

3551691312 is a `hidden beast` number, since 3 + 5 + 516 + 9 + 131 + 2 = 666.

It is a super-2 number, since 2×3551691312² = 25229022351472562688, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (3551691313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 503812 + ... + 510812.

Almost surely, 2^3551691312 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 3551691312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5372718624).

3551691312 is an abundant number, since it is smaller than the sum of its proper divisors (7193745936).

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

3551691312 is a wasteful number, since it uses less digits than its factorization.

3551691312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7299 (or 7290 counting only the distinct ones).

The product of its digits is 24300, while the sum is 36.

The square root of 3551691312 is about 59596.0679239830. The cubic root of 3551691312 is about 1525.7325244752.

The spelling of 3551691312 in words is "three billion, five hundred fifty-one million, six hundred ninety-one thousand, three hundred twelve".