51599890503 has 24 divisors (see below), whose sum is σ = 85520163456. Its totient is φ = 29368170000.

The previous prime is 51599890457. The next prime is 51599890513. The reversal of 51599890503 is 30509899515.

It is a happy number.

51599890503 is a `hidden beast` number, since 5 + 1 + 59 + 9 + 89 + 0 + 503 = 666.

It is not a de Polignac number, because 51599890503 - 2¹³ = 51599882311 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51599890503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51599890513) 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 23 ways as a sum of consecutive naturals, for example, 1615753 + ... + 1647378.

It is an arithmetic number, because the mean of its divisors is an integer number (3563340144).

Almost surely, 2^51599890503 is an apocalyptic number.

51599890503 is a deficient number, since it is larger than the sum of its proper divisors (33920272953).

51599890503 is a wasteful number, since it uses less digits than its factorization.

51599890503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3263395 (or 3263392 counting only the distinct ones).

The product of its (nonzero) digits is 2187000, while the sum is 54.

The spelling of 51599890503 in words is "fifty-one billion, five hundred ninety-nine million, eight hundred ninety thousand, five hundred three".