51123630204 has 18 divisors (see below), whose sum is σ = 129229176440. Its totient is φ = 17041210056.

The previous prime is 51123630203. The next prime is 51123630209. The reversal of 51123630204 is 40203632115.

51123630204 is a `hidden beast` number, since 5 + 1 + 1 + 2 + 3 + 630 + 20 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×51123630204² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51123630203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 710050384 + ... + 710050455.

Almost surely, 2^51123630204 is an apocalyptic number.

It is an amenable number.

51123630204 is an abundant number, since it is smaller than the sum of its proper divisors (78105546236).

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

51123630204 is a wasteful number, since it uses less digits than its factorization.

51123630204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1420100849 (or 1420100844 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The spelling of 51123630204 in words is "fifty-one billion, one hundred twenty-three million, six hundred thirty thousand, two hundred four".