3551603640 has 64 divisors (see below), whose sum is σ = 11474416800. Its totient is φ = 874240512.

The previous prime is 3551603623. The next prime is 3551603663. The reversal of 3551603640 is 463061553.

It is a super-2 number, since 2×3551603640² = 25227776831322499200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1136775 + ... + 1139894.

Almost surely, 2^3551603640 is an apocalyptic number.

3551603640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3551603640 is an abundant number, since it is smaller than the sum of its proper divisors (7922813160).

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

3551603640 is a wasteful number, since it uses less digits than its factorization.

3551603640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2276696 (or 2276692 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 33.

The square root of 3551603640 is about 59595.3323675605. The cubic root of 3551603640 is about 1525.7199703509.

The spelling of 3551603640 in words is "three billion, five hundred fifty-one million, six hundred three thousand, six hundred forty".