51504333440 has 64 divisors (see below), whose sum is σ = 140717208960. Its totient is φ = 17658627072.

The previous prime is 51504333409. The next prime is 51504333457. The reversal of 51504333440 is 4433340515.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 51504333397 and 51504333406.

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 7 ways as a sum of consecutive naturals, for example, 5743772 + ... + 5752731.

It is an arithmetic number, because the mean of its divisors is an integer number (2198706390).

Almost surely, 2^51504333440 is an apocalyptic number.

It is an amenable number.

51504333440 is an abundant number, since it is smaller than the sum of its proper divisors (89212875520).

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

51504333440 is a wasteful number, since it uses less digits than its factorization.

51504333440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11496529 (or 11496517 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 32.

Adding to 51504333440 its reverse (4433340515), we get a palindrome (55937673955).

The spelling of 51504333440 in words is "fifty-one billion, five hundred four million, three hundred thirty-three thousand, four hundred forty".