3557421756 has 288 divisors, whose sum is σ = 11269440000. Its totient is φ = 942907392.

The previous prime is 3557421743. The next prime is 3557421757. The reversal of 3557421756 is 6571247553.

It is a happy number.

3557421756 is a `hidden beast` number, since 3 + 5 + 574 + 2 + 1 + 75 + 6 = 666.

3557421756 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3557421757) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 13841980 + ... + 13842236.

It is an arithmetic number, because the mean of its divisors is an integer number (39130000).

Almost surely, 2^3557421756 is an apocalyptic number.

3557421756 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3557421756, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5634720000).

3557421756 is an abundant number, since it is smaller than the sum of its proper divisors (7712018244).

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

3557421756 is a wasteful number, since it uses less digits than its factorization.

3557421756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366 (or 347 counting only the distinct ones).

The product of its digits is 882000, while the sum is 45.

The square root of 3557421756 is about 59644.1259136220. The cubic root of 3557421756 is about 1526.5526433108.

The spelling of 3557421756 in words is "three billion, five hundred fifty-seven million, four hundred twenty-one thousand, seven hundred fifty-six".