555025640 has 64 divisors (see below), whose sum is σ = 1352529360. Its totient is φ = 203765760.

The previous prime is 555025631. The next prime is 555025657. The reversal of 555025640 is 46520555.

It can be written as a sum of positive squares in 8 ways, for example, as 95609284 + 459416356 = 9778^2 + 21434^2 .

It is a super-2 number, since 2×555025640² = 616106922114819200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 555025597 and 555025606.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91172 + ... + 97068.

Almost surely, 2^555025640 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 555025640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (676264680).

555025640 is an abundant number, since it is smaller than the sum of its proper divisors (797503720).

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

555025640 is a wasteful number, since it uses less digits than its factorization.

555025640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6102 (or 6098 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 32.

The square root of 555025640 is about 23558.9821511881. The cubic root of 555025640 is about 821.8092314665.

The spelling of 555025640 in words is "five hundred fifty-five million, twenty-five thousand, six hundred forty".