51853518849 has 32 divisors (see below), whose sum is σ = 79416207360. Its totient is φ = 29763633600.

The previous prime is 51853518809. The next prime is 51853518851. The reversal of 51853518849 is 94881535815.

It is not a de Polignac number, because 51853518849 - 2⁸ = 51853518593 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (51853518809) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2567539 + ... + 2587655.

It is an arithmetic number, because the mean of its divisors is an integer number (2481756480).

Almost surely, 2^51853518849 is an apocalyptic number.

It is an amenable number.

51853518849 is a deficient number, since it is larger than the sum of its proper divisors (27562688511).

51853518849 is a wasteful number, since it uses less digits than its factorization.

51853518849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24261.

The product of its digits is 6912000, while the sum is 57.

The spelling of 51853518849 in words is "fifty-one billion, eight hundred fifty-three million, five hundred eighteen thousand, eight hundred forty-nine".