51436722047 has 4 divisors (see below), whose sum is σ = 51437321880. Its totient is φ = 51436122216.

The previous prime is 51436721989. The next prime is 51436722067. The reversal of 51436722047 is 74022763415.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 74022763415 = 5 ⋅14804552683.

It is a cyclic number.

It is not a de Polignac number, because 51436722047 - 2²² = 51432527743 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51436721995 and 51436722013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51436722067) 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, 144413 + ... + 351750.

It is an arithmetic number, because the mean of its divisors is an integer number (12859330470).

Almost surely, 2^51436722047 is an apocalyptic number.

51436722047 is a deficient number, since it is larger than the sum of its proper divisors (599833).

51436722047 is a wasteful number, since it uses less digits than its factorization.

51436722047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599832.

The product of its (nonzero) digits is 282240, while the sum is 41.

The spelling of 51436722047 in words is "fifty-one billion, four hundred thirty-six million, seven hundred twenty-two thousand, forty-seven".