51881946543 has 12 divisors (see below), whose sum is σ = 85646388048. Its totient is φ = 29646826560.

The previous prime is 51881946533. The next prime is 51881946577. The reversal of 51881946543 is 34564918815.

It is a happy number.

51881946543 is a `hidden beast` number, since 5 + 1 + 8 + 8 + 1 + 94 + 6 + 543 = 666.

It is not a de Polignac number, because 51881946543 - 2¹⁴ = 51881930159 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51881946543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51881946533) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 411761418 + ... + 411761543.

It is an arithmetic number, because the mean of its divisors is an integer number (7137199004).

Almost surely, 2^51881946543 is an apocalyptic number.

51881946543 is a deficient number, since it is larger than the sum of its proper divisors (33764441505).

51881946543 is a wasteful number, since it uses less digits than its factorization.

51881946543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823522974 (or 823522971 counting only the distinct ones).

The product of its digits is 4147200, while the sum is 54.

The spelling of 51881946543 in words is "fifty-one billion, eight hundred eighty-one million, nine hundred forty-six thousand, five hundred forty-three".