51226136864 has 24 divisors (see below), whose sum is σ = 115258808448. Its totient is φ = 21954058560.

The previous prime is 51226136849. The next prime is 51226136947. The reversal of 51226136864 is 46863162215.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114343832 + ... + 114344279.

It is an arithmetic number, because the mean of its divisors is an integer number (4802450352).

Almost surely, 2^51226136864 is an apocalyptic number.

It is an amenable number.

51226136864 is an abundant number, since it is smaller than the sum of its proper divisors (64032671584).

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

51226136864 is a wasteful number, since it uses less digits than its factorization.

51226136864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228688128 (or 228688120 counting only the distinct ones).

The product of its digits is 414720, while the sum is 44.

The spelling of 51226136864 in words is "fifty-one billion, two hundred twenty-six million, one hundred thirty-six thousand, eight hundred sixty-four".