51105644259 has 16 divisors (see below), whose sum is σ = 71272437504. Its totient is φ = 32511679200.

The previous prime is 51105644159. The next prime is 51105644309. The reversal of 51105644259 is 95244650115.

It is a happy number.

It is not a de Polignac number, because 51105644259 - 2⁹ = 51105643747 is a prime.

It is a super-2 number, since 2×51105644259² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51105644259.

It is not an unprimeable number, because it can be changed into a prime (51105644059) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 850597 + ... + 908694.

It is an arithmetic number, because the mean of its divisors is an integer number (4454527344).

Almost surely, 2^51105644259 is an apocalyptic number.

51105644259 is a deficient number, since it is larger than the sum of its proper divisors (20166793245).

51105644259 is a wasteful number, since it uses less digits than its factorization.

51105644259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1759738.

The product of its (nonzero) digits is 216000, while the sum is 42.

The spelling of 51105644259 in words is "fifty-one billion, one hundred five million, six hundred forty-four thousand, two hundred fifty-nine".