555390561 has 16 divisors (see below), whose sum is σ = 855361728. Its totient is φ = 316800000.

The previous prime is 555390553. The next prime is 555390569. The reversal of 555390561 is 165093555.

It is an interprime number because it is at equal distance from previous prime (555390553) and next prime (555390569).

It is not a de Polignac number, because 555390561 - 2³ = 555390553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (555390569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 494440 + ... + 495561.

It is an arithmetic number, because the mean of its divisors is an integer number (53460108).

Almost surely, 2^555390561 is an apocalyptic number.

555390561 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

555390561 is a deficient number, since it is larger than the sum of its proper divisors (299971167).

555390561 is a wasteful number, since it uses less digits than its factorization.

555390561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990032.

The product of its (nonzero) digits is 101250, while the sum is 39.

The square root of 555390561 is about 23566.7257165691. The cubic root of 555390561 is about 821.9893010726.

The spelling of 555390561 in words is "five hundred fifty-five million, three hundred ninety thousand, five hundred sixty-one".