51554523555 has 12 divisors (see below), whose sum is σ = 89361174240. Its totient is φ = 27495745872.

The previous prime is 51554523551. The next prime is 51554523571. The reversal of 51554523555 is 55532545515.

51554523555 is a `hidden beast` number, since 5 + 1 + 55 + 45 + 2 + 3 + 555 = 666.

It is not a de Polignac number, because 51554523555 - 2² = 51554523551 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1145656079 = 51554523555 / (5 + 1 + 5 + 5 + 4 + 5 + 2 + 3 + 5 + 5 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 51554523555.

It is not an unprimeable number, because it can be changed into a prime (51554523551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 572827995 + ... + 572828084.

It is an arithmetic number, because the mean of its divisors is an integer number (7446764520).

Almost surely, 2^51554523555 is an apocalyptic number.

51554523555 is a deficient number, since it is larger than the sum of its proper divisors (37806650685).

51554523555 is a wasteful number, since it uses less digits than its factorization.

51554523555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1145656090 (or 1145656087 counting only the distinct ones).

The product of its digits is 1875000, while the sum is 45.

The spelling of 51554523555 in words is "fifty-one billion, five hundred fifty-four million, five hundred twenty-three thousand, five hundred fifty-five".