51142666860 has 36 divisors (see below), whose sum is σ = 155132756688. Its totient is φ = 13638044448.

The previous prime is 51142666831. The next prime is 51142666877. The reversal of 51142666860 is 6866624115.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 142062784 + ... + 142063143.

Almost surely, 2^51142666860 is an apocalyptic number.

It is an amenable number.

51142666860 is an abundant number, since it is smaller than the sum of its proper divisors (103990089828).

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

51142666860 is a wasteful number, since it uses less digits than its factorization.

51142666860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284125942 (or 284125937 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 51142666860 in words is "fifty-one billion, one hundred forty-two million, six hundred sixty-six thousand, eight hundred sixty".