51504340545 has 48 divisors (see below), whose sum is σ = 102068209152. Its totient is φ = 23535480960.

The previous prime is 51504340529. The next prime is 51504340561. The reversal of 51504340545 is 54504340515.

It is an interprime number because it is at equal distance from previous prime (51504340529) and next prime (51504340561).

It is not a de Polignac number, because 51504340545 - 2⁴ = 51504340529 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 794424 + ... + 856806.

It is an arithmetic number, because the mean of its divisors is an integer number (2126421024).

Almost surely, 2^51504340545 is an apocalyptic number.

It is an amenable number.

51504340545 is a deficient number, since it is larger than the sum of its proper divisors (50563868607).

51504340545 is a wasteful number, since it uses less digits than its factorization.

51504340545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65022 (or 65019 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 36.

The spelling of 51504340545 in words is "fifty-one billion, five hundred four million, three hundred forty thousand, five hundred forty-five".