51146208520 has 64 divisors (see below), whose sum is σ = 128933726400. Its totient is φ = 18095950080.

The previous prime is 51146208511. The next prime is 51146208593. The reversal of 51146208520 is 2580264115.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1554550 + ... + 1587109.

It is an arithmetic number, because the mean of its divisors is an integer number (2014589475).

Almost surely, 2^51146208520 is an apocalyptic number.

It is an amenable number.

51146208520 is an abundant number, since it is smaller than the sum of its proper divisors (77787517880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51146208520 is a wasteful number, since it uses less digits than its factorization.

51146208520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3141718 (or 3141714 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 34.

The spelling of 51146208520 in words is "fifty-one billion, one hundred forty-six million, two hundred eight thousand, five hundred twenty".