51776396954 has 4 divisors (see below), whose sum is σ = 77664595434. Its totient is φ = 25888198476.

The previous prime is 51776396929. The next prime is 51776396957. The reversal of 51776396954 is 45969367715.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 36949681729 + 14826715225 = 192223^2 + 121765^2 .

It is not an unprimeable number, because it can be changed into a prime (51776396957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12944099237 + ... + 12944099240.

Almost surely, 2^51776396954 is an apocalyptic number.

51776396954 is a deficient number, since it is larger than the sum of its proper divisors (25888198480).

51776396954 is a wasteful number, since it uses less digits than its factorization.

51776396954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25888198479.

The product of its digits is 42865200, while the sum is 62.

The spelling of 51776396954 in words is "fifty-one billion, seven hundred seventy-six million, three hundred ninety-six thousand, nine hundred fifty-four".