55626399 has 16 divisors (see below), whose sum is σ = 83043840. Its totient is φ = 36798840.

The previous prime is 55626383. The next prime is 55626407. The reversal of 55626399 is 99362655.

55626399 is a `hidden beast` number, since 5 + 5 + 6 + 2 + 639 + 9 = 666.

It is not a de Polignac number, because 55626399 - 2⁴ = 55626383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55626359) 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, 4327 + ... + 11400.

It is an arithmetic number, because the mean of its divisors is an integer number (5190240).

Almost surely, 2^55626399 is an apocalyptic number.

55626399 is a deficient number, since it is larger than the sum of its proper divisors (27417441).

55626399 is a wasteful number, since it uses less digits than its factorization.

55626399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15867 (or 15861 counting only the distinct ones).

The product of its digits is 437400, while the sum is 45.

The square root of 55626399 is about 7458.3107336715. The cubic root of 55626399 is about 381.7335362919.

The spelling of 55626399 in words is "fifty-five million, six hundred twenty-six thousand, three hundred ninety-nine".