51849049056 has 48 divisors (see below), whose sum is σ = 155547149184. Its totient is φ = 14814013824.

The previous prime is 51849049033. The next prime is 51849049081. The reversal of 51849049056 is 65094094815.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×51849049056² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38577490 + ... + 38578833.

It is an arithmetic number, because the mean of its divisors is an integer number (3240565608).

Almost surely, 2^51849049056 is an apocalyptic number.

51849049056 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

51849049056 is an abundant number, since it is smaller than the sum of its proper divisors (103698100128).

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

51849049056 is a wasteful number, since it uses less digits than its factorization.

51849049056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77156343 (or 77156335 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 51.

The spelling of 51849049056 in words is "fifty-one billion, eight hundred forty-nine million, forty-nine thousand, fifty-six".