553621640 has 64 divisors (see below), whose sum is σ = 1463434560. Its totient is φ = 185829120.

The previous prime is 553621619. The next prime is 553621657. The reversal of 553621640 is 46126355.

It is a junction number, because it is equal to n+sod(n) for n = 553621597 and 553621606.

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, 42674 + ... + 54113.

It is an arithmetic number, because the mean of its divisors is an integer number (22866165).

Almost surely, 2^553621640 is an apocalyptic number.

It is an amenable number.

553621640 is an abundant number, since it is smaller than the sum of its proper divisors (909812920).

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

553621640 is a wasteful number, since it uses less digits than its factorization.

553621640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96822 (or 96818 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 553621640 is about 23529.1657310666. The cubic root of 553621640 is about 821.1156932745.

Adding to 553621640 its reverse (46126355), we get a palindrome (599747995).

The spelling of 553621640 in words is "five hundred fifty-three million, six hundred twenty-one thousand, six hundred forty".