51246000369 has 48 divisors (see below), whose sum is σ = 78990896400. Its totient is φ = 31952890368.

The previous prime is 51246000361. The next prime is 51246000391. The reversal of 51246000369 is 96300064215.

It is a happy number.

51246000369 is a `hidden beast` number, since 5 + 12 + 4 + 600 + 0 + 36 + 9 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 1273633344 + 49972367025 = 35688^2 + 223545^2 .

It is not a de Polignac number, because 51246000369 - 2³ = 51246000361 is a prime.

It is a super-2 number, since 2×51246000369² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51246000361) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2199867 + ... + 2223039.

It is an arithmetic number, because the mean of its divisors is an integer number (1645643675).

Almost surely, 2^51246000369 is an apocalyptic number.

It is an amenable number.

51246000369 is a deficient number, since it is larger than the sum of its proper divisors (27744896031).

51246000369 is a wasteful number, since it uses less digits than its factorization.

51246000369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23474 (or 23471 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The spelling of 51246000369 in words is "fifty-one billion, two hundred forty-six million, three hundred sixty-nine", and thus it is an aban number.