51871453745 has 32 divisors (see below), whose sum is σ = 66291084288. Its totient is φ = 38829242368.

The previous prime is 51871453631. The next prime is 51871453757. The reversal of 51871453745 is 54735417815.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 51871453745 - 2⁸ = 51871453489 is a prime.

It is a super-3 number, since 3×51871453745³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51871453693 and 51871453702.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16377152 + ... + 16380318.

It is an arithmetic number, because the mean of its divisors is an integer number (2071596384).

Almost surely, 2^51871453745 is an apocalyptic number.

It is an amenable number.

51871453745 is a deficient number, since it is larger than the sum of its proper divisors (14419630543).

51871453745 is a wasteful number, since it uses less digits than its factorization.

51871453745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4249.

The product of its digits is 2352000, while the sum is 50.

The spelling of 51871453745 in words is "fifty-one billion, eight hundred seventy-one million, four hundred fifty-three thousand, seven hundred forty-five".