51000167040 has 128 divisors (see below), whose sum is σ = 162661374720. Its totient is φ = 13591818240.

The previous prime is 51000167027. The next prime is 51000167063. The reversal of 51000167040 is 4076100015.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 51000167040.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3585222 + ... + 3599418.

It is an arithmetic number, because the mean of its divisors is an integer number (1270791990).

Almost surely, 2^51000167040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51000167040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81330687360).

51000167040 is an abundant number, since it is smaller than the sum of its proper divisors (111661207680).

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

51000167040 is a wasteful number, since it uses less digits than its factorization.

51000167040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16090 (or 16078 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 24.

Adding to 51000167040 its reverse (4076100015), we get a palindrome (55076267055).

The spelling of 51000167040 in words is "fifty-one billion, one hundred sixty-seven thousand, forty".