51061554241121 has 12 divisors (see below), whose sum is σ = 54289903166220. Its totient is φ = 48015366282240.

The previous prime is 51061554241099. The next prime is 51061554241171. The reversal of 51061554241121 is 12114245516015.

It can be written as a sum of positive squares in 6 ways, for example, as 3603026570896 + 47458527670225 = 1898164^2 + 6889015^2 .

It is not a de Polignac number, because 51061554241121 - 2²² = 51061550046817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51061554241171) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77921540 + ... + 78574101.

It is an arithmetic number, because the mean of its divisors is an integer number (4524158597185).

Almost surely, 2^{51061554241121} is an apocalyptic number.

It is an amenable number.

51061554241121 is a deficient number, since it is larger than the sum of its proper divisors (3228348925099).

51061554241121 is a wasteful number, since it uses less digits than its factorization.

51061554241121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156496804 (or 156496787 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 38.

Adding to 51061554241121 its reverse (12114245516015), we get a palindrome (63175799757136).

The spelling of 51061554241121 in words is "fifty-one trillion, sixty-one billion, five hundred fifty-four million, two hundred forty-one thousand, one hundred twenty-one".