51617444886 has 160 divisors (see below), whose sum is σ = 137676920832. Its totient is φ = 14146332480.

The previous prime is 51617444831. The next prime is 51617444891. The reversal of 51617444886 is 68844471615.

51617444886 is a `hidden beast` number, since 51 + 6 + 1 + 74 + 448 + 86 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2970355 + ... + 2987681.

Almost surely, 2^51617444886 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51617444886, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68838460416).

51617444886 is an abundant number, since it is smaller than the sum of its proper divisors (86059475946).

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

51617444886 is a wasteful number, since it uses less digits than its factorization.

51617444886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17456 (or 17447 counting only the distinct ones).

The product of its digits is 5160960, while the sum is 54.

The spelling of 51617444886 in words is "fifty-one billion, six hundred seventeen million, four hundred forty-four thousand, eight hundred eighty-six".