51900648847 has 4 divisors (see below), whose sum is σ = 52169564320. Its totient is φ = 51631733376.

The previous prime is 51900648823. The next prime is 51900648853. The reversal of 51900648847 is 74884600915.

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

It is a cyclic number.

It is not a de Polignac number, because 51900648847 - 2¹⁹ = 51900124559 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51900648794 and 51900648803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51900648347) 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, 134457447 + ... + 134457832.

It is an arithmetic number, because the mean of its divisors is an integer number (13042391080).

Almost surely, 2^51900648847 is an apocalyptic number.

51900648847 is a deficient number, since it is larger than the sum of its proper divisors (268915473).

51900648847 is a wasteful number, since it uses less digits than its factorization.

51900648847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268915472.

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 51900648847 in words is "fifty-one billion, nine hundred million, six hundred forty-eight thousand, eight hundred forty-seven".