51541712744721 has 16 divisors (see below), whose sum is σ = 71480651624448. Its totient is φ = 32998880350800.

The previous prime is 51541712744693. The next prime is 51541712744737. The reversal of 51541712744721 is 12744721714515.

It is not a de Polignac number, because 51541712744721 - 2⁵ = 51541712744689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51541712742721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2115300661 + ... + 2115325026.

It is an arithmetic number, because the mean of its divisors is an integer number (4467540726528).

Almost surely, 2^{51541712744721} is an apocalyptic number.

It is an amenable number.

51541712744721 is a deficient number, since it is larger than the sum of its proper divisors (19938938879727).

51541712744721 is a wasteful number, since it uses less digits than its factorization.

51541712744721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4230625852.

The product of its digits is 2195200, while the sum is 51.

The spelling of 51541712744721 in words is "fifty-one trillion, five hundred forty-one billion, seven hundred twelve million, seven hundred forty-four thousand, seven hundred twenty-one".