51637968547 has 8 divisors (see below), whose sum is σ = 56334165552. Its totient is φ = 46942077600.

The previous prime is 51637968533. The next prime is 51637968553. The reversal of 51637968547 is 74586973615.

It is a happy number.

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

It is not a de Polignac number, because 51637968547 - 2⁷ = 51637968419 is a prime.

It is a super-2 number, since 2×51637968547² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51637968647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 411793 + ... + 522349.

It is an arithmetic number, because the mean of its divisors is an integer number (7041770694).

Almost surely, 2^51637968547 is an apocalyptic number.

51637968547 is a deficient number, since it is larger than the sum of its proper divisors (4696197005).

51637968547 is a wasteful number, since it uses less digits than its factorization.

51637968547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153029.

The product of its digits is 38102400, while the sum is 61.

The spelling of 51637968547 in words is "fifty-one billion, six hundred thirty-seven million, nine hundred sixty-eight thousand, five hundred forty-seven".