51000156160 has 56 divisors (see below), whose sum is σ = 122393002356. Its totient is φ = 20400046080.

The previous prime is 51000156143. The next prime is 51000156161. The reversal of 51000156160 is 6165100015.

It can be written as a sum of positive squares in 2 ways, for example, as 44362469376 + 6637686784 = 210624^2 + 81472^2 .

It is not an unprimeable number, because it can be changed into a prime (51000156161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 581601 + ... + 663520.

Almost surely, 2^51000156160 is an apocalyptic number.

It is an amenable number.

51000156160 is an abundant number, since it is smaller than the sum of its proper divisors (71392846196).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51000156160 is an equidigital number, since it uses as much as digits as its factorization.

51000156160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1245152 (or 1245128 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 25.

Adding to 51000156160 its reverse (6165100015), we get a palindrome (57165256175).

The spelling of 51000156160 in words is "fifty-one billion, one hundred fifty-six thousand, one hundred sixty".