51800794499 has 2 divisors, whose sum is σ = 51800794500. Its totient is φ = 51800794498.

The previous prime is 51800794489. The next prime is 51800794517. The reversal of 51800794499 is 99449700815.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51800794499 - 2⁴ = 51800794483 is a prime.

It is a super-2 number, since 2×51800794499² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51800794489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25900397249 + 25900397250.

It is an arithmetic number, because the mean of its divisors is an integer number (25900397250).

Almost surely, 2^51800794499 is an apocalyptic number.

51800794499 is a deficient number, since it is larger than the sum of its proper divisors (1).

51800794499 is an equidigital number, since it uses as much as digits as its factorization.

51800794499 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3265920, while the sum is 56.

The spelling of 51800794499 in words is "fifty-one billion, eight hundred million, seven hundred ninety-four thousand, four hundred ninety-nine".