51395007946 has 8 divisors (see below), whose sum is σ = 77095692324. Its totient is φ = 25696443840.

The previous prime is 51395007931. The next prime is 51395007947. The reversal of 51395007946 is 64970059315.

It can be written as a sum of positive squares in 2 ways, for example, as 50191681225 + 1203326721 = 224035^2 + 34689^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 51395007946.

It is not an unprimeable number, because it can be changed into a prime (51395007947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 468015 + ... + 567298.

Almost surely, 2^51395007946 is an apocalyptic number.

51395007946 is a deficient number, since it is larger than the sum of its proper divisors (25700684378).

51395007946 is a wasteful number, since it uses less digits than its factorization.

51395007946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1060136.

The product of its (nonzero) digits is 1020600, while the sum is 49.

The spelling of 51395007946 in words is "fifty-one billion, three hundred ninety-five million, seven thousand, nine hundred forty-six".