51450125881 has 32 divisors (see below), whose sum is σ = 69305068800. Its totient is φ = 37732665600.

The previous prime is 51450125851. The next prime is 51450125933. The reversal of 51450125881 is 18852105415.

It is a happy number.

It is not a de Polignac number, because 51450125881 - 2⁹ = 51450125369 is a prime.

It is a super-2 number, since 2×51450125881² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51450125851) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 336930 + ... + 465211.

It is an arithmetic number, because the mean of its divisors is an integer number (2165783400).

Almost surely, 2^51450125881 is an apocalyptic number.

It is an amenable number.

51450125881 is a deficient number, since it is larger than the sum of its proper divisors (17854942919).

51450125881 is a wasteful number, since it uses less digits than its factorization.

51450125881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802190 (or 802176 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 40.

The spelling of 51450125881 in words is "fifty-one billion, four hundred fifty million, one hundred twenty-five thousand, eight hundred eighty-one".