51447465240 has 256 divisors, whose sum is σ = 162051563520. Its totient is φ = 13053519360.

The previous prime is 51447465131. The next prime is 51447465241. The reversal of 51447465240 is 4256474415.

It is a junction number, because it is equal to n+sod(n) for n = 51447465192 and 51447465201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51447465241) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 74453295 + ... + 74453985.

It is an arithmetic number, because the mean of its divisors is an integer number (633013920).

Almost surely, 2^51447465240 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 51447465240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81025781760).

51447465240 is an abundant number, since it is smaller than the sum of its proper divisors (110604098280).

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

51447465240 is a wasteful number, since it uses less digits than its factorization.

51447465240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1102 (or 1098 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 42.

The spelling of 51447465240 in words is "fifty-one billion, four hundred forty-seven million, four hundred sixty-five thousand, two hundred forty".