51281469484 has 72 divisors (see below), whose sum is σ = 107372125728. Its totient is φ = 20991632640.

The previous prime is 51281469431. The next prime is 51281469487. The reversal of 51281469484 is 48496418215.

It is a super-2 number, since 2×51281469484² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51281469487) 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, 12158544 + ... + 12162760.

It is an arithmetic number, because the mean of its divisors is an integer number (1491279524).

Almost surely, 2^51281469484 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 51281469484, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53686062864).

51281469484 is an abundant number, since it is smaller than the sum of its proper divisors (56090656244).

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

51281469484 is a wasteful number, since it uses less digits than its factorization.

51281469484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5095 (or 5070 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 52.

The spelling of 51281469484 in words is "fifty-one billion, two hundred eighty-one million, four hundred sixty-nine thousand, four hundred eighty-four".