51445302125440 has 64 divisors (see below), whose sum is σ = 127227336660000. Its totient is φ = 19868530468864.

The previous prime is 51445302125381. The next prime is 51445302125447. The reversal of 51445302125440 is 4452120354415.

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

It is a super-2 number, since 2×51445302125440² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 51445302125393 and 51445302125402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51445302125447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1385900140 + ... + 1385937259.

Almost surely, 2^{51445302125440} is an apocalyptic number.

It is an amenable number.

51445302125440 is an abundant number, since it is smaller than the sum of its proper divisors (75782034534560).

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

51445302125440 is a wasteful number, since it uses less digits than its factorization.

51445302125440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2771837447 (or 2771837435 counting only the distinct ones).

The product of its (nonzero) digits is 384000, while the sum is 40.

Adding to 51445302125440 its reverse (4452120354415), we get a palindrome (55897422479855).

The spelling of 51445302125440 in words is "fifty-one trillion, four hundred forty-five billion, three hundred two million, one hundred twenty-five thousand, four hundred forty".