51920963258 has 4 divisors (see below), whose sum is σ = 77881444890. Its totient is φ = 25960481628.

The previous prime is 51920963251. The next prime is 51920963267. The reversal of 51920963258 is 85236902915.

51920963258 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 can be written as a sum of positive squares in only one way, i.e., 51081876169 + 839087089 = 226013^2 + 28967^2 .

It is not an unprimeable number, because it can be changed into a prime (51920963251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12980240813 + ... + 12980240816.

Almost surely, 2^51920963258 is an apocalyptic number.

51920963258 is a deficient number, since it is larger than the sum of its proper divisors (25960481632).

51920963258 is a wasteful number, since it uses less digits than its factorization.

51920963258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25960481631.

The product of its (nonzero) digits is 1166400, while the sum is 50.

The spelling of 51920963258 in words is "fifty-one billion, nine hundred twenty million, nine hundred sixty-three thousand, two hundred fifty-eight".