51408991146 has 16 divisors (see below), whose sum is σ = 103973241600. Its totient is φ = 16943787168.

The previous prime is 51408991111. The next prime is 51408991159. The reversal of 51408991146 is 64119980415.

It is a junction number, because it is equal to n+sod(n) for n = 51408991095 and 51408991104.

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, 48135226 + ... + 48136293.

It is an arithmetic number, because the mean of its divisors is an integer number (6498327600).

Almost surely, 2^51408991146 is an apocalyptic number.

51408991146 is an abundant number, since it is smaller than the sum of its proper divisors (52564250454).

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

51408991146 is a wasteful number, since it uses less digits than its factorization.

51408991146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96271613.

The product of its (nonzero) digits is 311040, while the sum is 48.

The spelling of 51408991146 in words is "fifty-one billion, four hundred eight million, nine hundred ninety-one thousand, one hundred forty-six".