51863540007 has 16 divisors (see below), whose sum is σ = 73347386112. Its totient is φ = 32484819840.

The previous prime is 51863539997. The next prime is 51863540059. The reversal of 51863540007 is 70004536815.

It is not a de Polignac number, because 51863540007 - 2⁸ = 51863539751 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51863580007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 861363 + ... + 919604.

It is an arithmetic number, because the mean of its divisors is an integer number (4584211632).

Almost surely, 2^51863540007 is an apocalyptic number.

51863540007 is a deficient number, since it is larger than the sum of its proper divisors (21483846105).

51863540007 is a wasteful number, since it uses less digits than its factorization.

51863540007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1781558.

The product of its (nonzero) digits is 100800, while the sum is 39.

The spelling of 51863540007 in words is "fifty-one billion, eight hundred sixty-three million, five hundred forty thousand, seven".