51004043345 has 4 divisors (see below), whose sum is σ = 61204852020. Its totient is φ = 40803234672.

The previous prime is 51004043339. The next prime is 51004043381. The reversal of 51004043345 is 54334040015.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27064527169 + 23939516176 = 164513^2 + 154724^2 .

It is a cyclic number.

It is not a de Polignac number, because 51004043345 - 2⁴ = 51004043329 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5100404330 + ... + 5100404339.

It is an arithmetic number, because the mean of its divisors is an integer number (15301213005).

Almost surely, 2^51004043345 is an apocalyptic number.

It is an amenable number.

51004043345 is a deficient number, since it is larger than the sum of its proper divisors (10200808675).

51004043345 is a wasteful number, since it uses less digits than its factorization.

51004043345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10200808674.

The product of its (nonzero) digits is 14400, while the sum is 29.

The spelling of 51004043345 in words is "fifty-one billion, four million, forty-three thousand, three hundred forty-five".