51266814394 has 8 divisors (see below), whose sum is σ = 79551953460. Its totient is φ = 24749496576.

The previous prime is 51266814359. The next prime is 51266814419. The reversal of 51266814394 is 49341866215.

It can be written as a sum of positive squares in 2 ways, for example, as 47322346369 + 3944468025 = 217537^2 + 62805^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 441955239 + ... + 441955354.

Almost surely, 2^51266814394 is an apocalyptic number.

51266814394 is a deficient number, since it is larger than the sum of its proper divisors (28285139066).

51266814394 is a wasteful number, since it uses less digits than its factorization.

51266814394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883910624.

The product of its digits is 1244160, while the sum is 49.

The spelling of 51266814394 in words is "fifty-one billion, two hundred sixty-six million, eight hundred fourteen thousand, three hundred ninety-four".