51644366465530 has 16 divisors (see below), whose sum is σ = 92964721645224. Its totient is φ = 20656666140160.

The previous prime is 51644366465501. The next prime is 51644366465551. The reversal of 51644366465530 is 3556466344615.

It can be written as a sum of positive squares in 4 ways, for example, as 51626251189881 + 18115275649 = 7185141^2 + 134593^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134854987 + ... + 135237406.

Almost surely, 2^{51644366465530} is an apocalyptic number.

51644366465530 is a deficient number, since it is larger than the sum of its proper divisors (41320355179694).

51644366465530 is a wasteful number, since it uses less digits than its factorization.

51644366465530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270111521.

The product of its (nonzero) digits is 93312000, while the sum is 58.

The spelling of 51644366465530 in words is "fifty-one trillion, six hundred forty-four billion, three hundred sixty-six million, four hundred sixty-five thousand, five hundred thirty".