51542178860 has 48 divisors (see below), whose sum is σ = 108577539840. Its totient is φ = 20552417280.

The previous prime is 51542178847. The next prime is 51542178871. The reversal of 51542178860 is 6887124515.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9332900 + ... + 9338420.

It is an arithmetic number, because the mean of its divisors is an integer number (2262032080).

Almost surely, 2^51542178860 is an apocalyptic number.

It is an amenable number.

51542178860 is an abundant number, since it is smaller than the sum of its proper divisors (57035360980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51542178860 is a wasteful number, since it uses less digits than its factorization.

51542178860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6906 (or 6904 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 47.

The spelling of 51542178860 in words is "fifty-one billion, five hundred forty-two million, one hundred seventy-eight thousand, eight hundred sixty".