51858141840 has 160 divisors (see below), whose sum is σ = 182423324160. Its totient is φ = 13534580736.

The previous prime is 51858141809. The next prime is 51858141859. The reversal of 51858141840 is 4814185815.

51858141840 is a `hidden beast` number, since 5 + 18 + 581 + 4 + 18 + 40 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 153889 + ... + 356928.

It is an arithmetic number, because the mean of its divisors is an integer number (1140145776).

Almost surely, 2^51858141840 is an apocalyptic number.

It is an amenable number.

51858141840 is an abundant number, since it is smaller than the sum of its proper divisors (130565182320).

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

51858141840 is a wasteful number, since it uses less digits than its factorization.

51858141840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510886 (or 510874 counting only the distinct ones).

The product of its (nonzero) digits is 204800, while the sum is 45.

The spelling of 51858141840 in words is "fifty-one billion, eight hundred fifty-eight million, one hundred forty-one thousand, eight hundred forty".