51167752161 has 8 divisors (see below), whose sum is σ = 68226136320. Its totient is φ = 34110601392.

The previous prime is 51167752159. The next prime is 51167752193. The reversal of 51167752161 is 16125776115.

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

It is not a de Polignac number, because 51167752161 - 2¹ = 51167752159 is a prime.

It is a super-2 number, since 2×51167752161² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51167752121) 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, 206766 + ... + 380903.

It is an arithmetic number, because the mean of its divisors is an integer number (8528267040).

Almost surely, 2^51167752161 is an apocalyptic number.

It is an amenable number.

51167752161 is a deficient number, since it is larger than the sum of its proper divisors (17058384159).

51167752161 is a wasteful number, since it uses less digits than its factorization.

51167752161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616695.

The product of its digits is 88200, while the sum is 42.

The spelling of 51167752161 in words is "fifty-one billion, one hundred sixty-seven million, seven hundred fifty-two thousand, one hundred sixty-one".