51650257567 has 4 divisors (see below), whose sum is σ = 51909806800. Its totient is φ = 51390708336.

The previous prime is 51650257511. The next prime is 51650257649. The reversal of 51650257567 is 76575205615.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76575205615 = 5 ⋅15315041123.

It is a cyclic number.

It is not a de Polignac number, because 51650257567 - 2¹⁵ = 51650224799 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51650257567.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51650255567) 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, 129774318 + ... + 129774715.

It is an arithmetic number, because the mean of its divisors is an integer number (12977451700).

Almost surely, 2^51650257567 is an apocalyptic number.

51650257567 is a deficient number, since it is larger than the sum of its proper divisors (259549233).

51650257567 is a wasteful number, since it uses less digits than its factorization.

51650257567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259549232.

The product of its (nonzero) digits is 2205000, while the sum is 49.

The spelling of 51650257567 in words is "fifty-one billion, six hundred fifty million, two hundred fifty-seven thousand, five hundred sixty-seven".