51643272503 has 8 divisors (see below), whose sum is σ = 54720732240. Its totient is φ = 48570215040.

The previous prime is 51643272493. The next prime is 51643272511. The reversal of 51643272503 is 30527234615.

51643272503 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51643272503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51643272523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1076393 + ... + 1123346.

It is an arithmetic number, because the mean of its divisors is an integer number (6840091530).

Almost surely, 2^51643272503 is an apocalyptic number.

51643272503 is a deficient number, since it is larger than the sum of its proper divisors (3077459737).

51643272503 is a wasteful number, since it uses less digits than its factorization.

51643272503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2201137.

The product of its (nonzero) digits is 151200, while the sum is 38.

The spelling of 51643272503 in words is "fifty-one billion, six hundred forty-three million, two hundred seventy-two thousand, five hundred three".