51253673161 has 8 divisors (see below), whose sum is σ = 52226146440. Its totient is φ = 50281400832.

The previous prime is 51253673143. The next prime is 51253673197. The reversal of 51253673161 is 16137635215.

It can be written as a sum of positive squares in 4 ways, for example, as 1969673161 + 49284000000 = 44381^2 + 222000^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51253673161 - 2⁵ = 51253673129 is a prime.

It is a super-2 number, since 2×51253673161² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51253673111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 527001 + ... + 616633.

It is an arithmetic number, because the mean of its divisors is an integer number (6528268305).

Almost surely, 2^51253673161 is an apocalyptic number.

It is an amenable number.

51253673161 is a deficient number, since it is larger than the sum of its proper divisors (972473279).

51253673161 is a wasteful number, since it uses less digits than its factorization.

51253673161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100475.

The product of its digits is 113400, while the sum is 40.

The spelling of 51253673161 in words is "fifty-one billion, two hundred fifty-three million, six hundred seventy-three thousand, one hundred sixty-one".