51848434781 has 24 divisors (see below), whose sum is σ = 61397736960. Its totient is φ = 43492569120.

The previous prime is 51848434751. The next prime is 51848434817. The reversal of 51848434781 is 18743484815.

It is not a de Polignac number, because 51848434781 - 2²² = 51844240477 is a prime.

It is a super-2 number, since 2×51848434781² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51848434721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5845556 + ... + 5854418.

It is an arithmetic number, because the mean of its divisors is an integer number (2558239040).

Almost surely, 2^51848434781 is an apocalyptic number.

It is an amenable number.

51848434781 is a deficient number, since it is larger than the sum of its proper divisors (9549302179).

51848434781 is a wasteful number, since it uses less digits than its factorization.

51848434781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12617 (or 12606 counting only the distinct ones).

The product of its digits is 3440640, while the sum is 53.

The spelling of 51848434781 in words is "fifty-one billion, eight hundred forty-eight million, four hundred thirty-four thousand, seven hundred eighty-one".