51155601012 has 36 divisors (see below), whose sum is σ = 129539723040. Its totient is φ = 17021572752.

The previous prime is 51155600981. The next prime is 51155601019. The reversal of 51155601012 is 21010655115.

51155601012 is a `hidden beast` number, since 5 + 1 + 1 + 55 + 601 + 0 + 1 + 2 = 666.

51155601012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51155601019) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1241712 + ... + 1282247.

It is an arithmetic number, because the mean of its divisors is an integer number (3598325640).

Almost surely, 2^51155601012 is an apocalyptic number.

It is an amenable number.

51155601012 is an abundant number, since it is smaller than the sum of its proper divisors (78384122028).

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

51155601012 is a wasteful number, since it uses less digits than its factorization.

51155601012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2524532 (or 2524527 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 27.

The spelling of 51155601012 in words is "fifty-one billion, one hundred fifty-five million, six hundred one thousand, twelve".