51034445640 has 96 divisors (see below), whose sum is σ = 171212371200. Its totient is φ = 13170176640.

The previous prime is 51034445629. The next prime is 51034445647. The reversal of 51034445640 is 4654443015.

51034445640 is a `hidden beast` number, since 5 + 1 + 0 + 3 + 4 + 4 + 4 + 5 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 51034445595 and 51034445604.

It is not an unprimeable number, because it can be changed into a prime (51034445647) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2275330 + ... + 2297649.

It is an arithmetic number, because the mean of its divisors is an integer number (1783462200).

Almost surely, 2^51034445640 is an apocalyptic number.

It is an amenable number.

51034445640 is an abundant number, since it is smaller than the sum of its proper divisors (120177925560).

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

51034445640 is a wasteful number, since it uses less digits than its factorization.

51034445640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4573027 (or 4573020 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

Adding to 51034445640 its reverse (4654443015), we get a palindrome (55688888655).

The spelling of 51034445640 in words is "fifty-one billion, thirty-four million, four hundred forty-five thousand, six hundred forty".