51446187860 has 12 divisors (see below), whose sum is σ = 108036994548. Its totient is φ = 20578475136.

The previous prime is 51446187853. The next prime is 51446187883. The reversal of 51446187860 is 6878164415.

It can be written as a sum of positive squares in 2 ways, for example, as 28773658384 + 22672529476 = 169628^2 + 150574^2 .

It is a super-2 number, since 2×51446187860² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 51446187799 and 51446187808.

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, 1286154677 + ... + 1286154716.

It is an arithmetic number, because the mean of its divisors is an integer number (9003082879).

Almost surely, 2^51446187860 is an apocalyptic number.

It is an amenable number.

51446187860 is an abundant number, since it is smaller than the sum of its proper divisors (56590806688).

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

51446187860 is a wasteful number, since it uses less digits than its factorization.

51446187860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2572309402 (or 2572309400 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 50.

The spelling of 51446187860 in words is "fifty-one billion, four hundred forty-six million, one hundred eighty-seven thousand, eight hundred sixty".