51259998163 has 4 divisors (see below), whose sum is σ = 55919998008. Its totient is φ = 46599998320.

The previous prime is 51259998161. The next prime is 51259998169. The reversal of 51259998163 is 36189995215.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51259998163 - 2¹ = 51259998161 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51259998098 and 51259998107.

It is not an unprimeable number, because it can be changed into a prime (51259998161) 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, 2329999906 + ... + 2329999927.

It is an arithmetic number, because the mean of its divisors is an integer number (13979999502).

Almost surely, 2^51259998163 is an apocalyptic number.

51259998163 is a deficient number, since it is larger than the sum of its proper divisors (4659999845).

51259998163 is a wasteful number, since it uses less digits than its factorization.

51259998163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4659999844.

The product of its digits is 5248800, while the sum is 58.

The spelling of 51259998163 in words is "fifty-one billion, two hundred fifty-nine million, nine hundred ninety-eight thousand, one hundred sixty-three".