51161735208 has 32 divisors (see below), whose sum is σ = 128574005760. Its totient is φ = 16964622720.

The previous prime is 51161735203. The next prime is 51161735213. The reversal of 51161735208 is 80253716115.

It is an interprime number because it is at equal distance from previous prime (51161735203) and next prime (51161735213).

It is not an unprimeable number, because it can be changed into a prime (51161735203) 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, 5575885 + ... + 5585052.

It is an arithmetic number, because the mean of its divisors is an integer number (4017937680).

Almost surely, 2^51161735208 is an apocalyptic number.

It is an amenable number.

51161735208 is an abundant number, since it is smaller than the sum of its proper divisors (77412270552).

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

51161735208 is a wasteful number, since it uses less digits than its factorization.

51161735208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11161137 (or 11161133 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 39.

The spelling of 51161735208 in words is "fifty-one billion, one hundred sixty-one million, seven hundred thirty-five thousand, two hundred eight".