51746699737 has 4 divisors (see below), whose sum is σ = 51750495796. Its totient is φ = 51742903680.

The previous prime is 51746699731. The next prime is 51746699743. The reversal of 51746699737 is 73799664715.

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

It is an interprime number because it is at equal distance from previous prime (51746699731) and next prime (51746699743).

It can be written as a sum of positive squares in 2 ways, for example, as 26258257936 + 25488441801 = 162044^2 + 159651^2 .

It is a cyclic number.

It is not a de Polignac number, because 51746699737 - 2³¹ = 49599216089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51746699731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1877508 + ... + 1904869.

It is an arithmetic number, because the mean of its divisors is an integer number (12937623949).

Almost surely, 2^51746699737 is an apocalyptic number.

It is an amenable number.

51746699737 is a deficient number, since it is larger than the sum of its proper divisors (3796059).

51746699737 is a wasteful number, since it uses less digits than its factorization.

51746699737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3796058.

The product of its digits is 60011280, while the sum is 64.

The spelling of 51746699737 in words is "fifty-one billion, seven hundred forty-six million, six hundred ninety-nine thousand, seven hundred thirty-seven".