555640722 has 80 divisors (see below), whose sum is σ = 1532405952. Its totient is φ = 146538720.

The previous prime is 555640717. The next prime is 555640747. The reversal of 555640722 is 227046555.

555640722 is a `hidden beast` number, since 5 + 5 + 5 + 640 + 7 + 2 + 2 = 666.

It is a super-2 number, since 2×555640722² = 617473223889362568, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4104 + ... + 33587.

Almost surely, 2^555640722 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 555640722, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (766202976).

555640722 is an abundant number, since it is smaller than the sum of its proper divisors (976765230).

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

555640722 is a wasteful number, since it uses less digits than its factorization.

555640722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37725 (or 37716 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 36.

The square root of 555640722 is about 23572.0326234290. The cubic root of 555640722 is about 822.1126969998.

The spelling of 555640722 in words is "five hundred fifty-five million, six hundred forty thousand, seven hundred twenty-two".