51446663340 has 24 divisors (see below), whose sum is σ = 144050657520. Its totient is φ = 13719110208.

The previous prime is 51446663309. The next prime is 51446663363. The reversal of 51446663340 is 4336664415.

It is a junction number, because it is equal to n+sod(n) for n = 51446663292 and 51446663301.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 428722135 + ... + 428722254.

It is an arithmetic number, because the mean of its divisors is an integer number (6002110730).

Almost surely, 2^51446663340 is an apocalyptic number.

It is an amenable number.

51446663340 is an abundant number, since it is smaller than the sum of its proper divisors (92603994180).

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

51446663340 is a wasteful number, since it uses less digits than its factorization.

51446663340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857444401 (or 857444399 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 42.

The spelling of 51446663340 in words is "fifty-one billion, four hundred forty-six million, six hundred sixty-three thousand, three hundred forty".