51542131768 has 16 divisors (see below), whose sum is σ = 102326291280. Its totient is φ = 24255120768.

The previous prime is 51542131759. The next prime is 51542131787. The reversal of 51542131768 is 86713124515.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189492996 + ... + 189493267.

It is an arithmetic number, because the mean of its divisors is an integer number (6395393205).

Almost surely, 2^51542131768 is an apocalyptic number.

It is an amenable number.

51542131768 is a deficient number, since it is larger than the sum of its proper divisors (50784159512).

51542131768 is a wasteful number, since it uses less digits than its factorization.

51542131768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378986286 (or 378986282 counting only the distinct ones).

The product of its digits is 201600, while the sum is 43.

The spelling of 51542131768 in words is "fifty-one billion, five hundred forty-two million, one hundred thirty-one thousand, seven hundred sixty-eight".