51404233440 has 96 divisors (see below), whose sum is σ = 185055252480. Its totient is φ = 11749538304.

The previous prime is 51404233423. The next prime is 51404233477. The reversal of 51404233440 is 4433240415.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 51404233398 and 51404233407.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7646080 + ... + 7652799.

It is an arithmetic number, because the mean of its divisors is an integer number (1927658880).

Almost surely, 2^51404233440 is an apocalyptic number.

It is an amenable number.

51404233440 is an abundant number, since it is smaller than the sum of its proper divisors (133651019040).

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

51404233440 is a wasteful number, since it uses less digits than its factorization.

51404233440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15298904 (or 15298896 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 30.

Adding to 51404233440 its reverse (4433240415), we get a palindrome (55837473855).

The spelling of 51404233440 in words is "fifty-one billion, four hundred four million, two hundred thirty-three thousand, four hundred forty".