51061010556 has 12 divisors (see below), whose sum is σ = 119142357992. Its totient is φ = 17020336848.

The previous prime is 51061010519. The next prime is 51061010557. The reversal of 51061010556 is 65501016015.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51061010557) 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, 2127542095 + ... + 2127542118.

Almost surely, 2^51061010556 is an apocalyptic number.

It is an amenable number.

51061010556 is an abundant number, since it is smaller than the sum of its proper divisors (68081347436).

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

51061010556 is a wasteful number, since it uses less digits than its factorization.

51061010556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4255084220 (or 4255084218 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 30.

The spelling of 51061010556 in words is "fifty-one billion, sixty-one million, ten thousand, five hundred fifty-six".