51637968548 has 6 divisors (see below), whose sum is σ = 90366444966. Its totient is φ = 25818984272.

The previous prime is 51637968533. The next prime is 51637968553. The reversal of 51637968548 is 84586973615.

51637968548 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 51543529024 + 94439524 = 227032^2 + 9718^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6454746065 + ... + 6454746072.

It is an arithmetic number, because the mean of its divisors is an integer number (15061074161).

Almost surely, 2^51637968548 is an apocalyptic number.

It is an amenable number.

51637968548 is a deficient number, since it is larger than the sum of its proper divisors (38728476418).

51637968548 is a wasteful number, since it uses less digits than its factorization.

51637968548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12909492141 (or 12909492139 counting only the distinct ones).

The product of its digits is 43545600, while the sum is 62.

The spelling of 51637968548 in words is "fifty-one billion, six hundred thirty-seven million, nine hundred sixty-eight thousand, five hundred forty-eight".