51338851336 has 8 divisors (see below), whose sum is σ = 96260346270. Its totient is φ = 25669425664.

The previous prime is 51338851331. The next prime is 51338851337. The reversal of 51338851336 is 63315883315.

It can be written as a sum of positive squares in only one way, i.e., 40117686436 + 11221164900 = 200294^2 + 105930^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (51338851331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3208678201 + ... + 3208678216.

Almost surely, 2^51338851336 is an apocalyptic number.

It is an amenable number.

51338851336 is a deficient number, since it is larger than the sum of its proper divisors (44921494934).

51338851336 is a wasteful number, since it uses less digits than its factorization.

51338851336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6417356423 (or 6417356419 counting only the distinct ones).

The product of its digits is 777600, while the sum is 46.

The spelling of 51338851336 in words is "fifty-one billion, three hundred thirty-eight million, eight hundred fifty-one thousand, three hundred thirty-six".