51920963246 has 4 divisors (see below), whose sum is σ = 77881444872. Its totient is φ = 25960481622.

The previous prime is 51920963231. The next prime is 51920963251. The reversal of 51920963246 is 64236902915.

It is a happy number.

51920963246 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51920963246.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12980240810 + ... + 12980240813.

It is an arithmetic number, because the mean of its divisors is an integer number (19470361218).

Almost surely, 2^51920963246 is an apocalyptic number.

51920963246 is a deficient number, since it is larger than the sum of its proper divisors (25960481626).

51920963246 is a wasteful number, since it uses less digits than its factorization.

51920963246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25960481625.

The product of its (nonzero) digits is 699840, while the sum is 47.

The spelling of 51920963246 in words is "fifty-one billion, nine hundred twenty million, nine hundred sixty-three thousand, two hundred forty-six".