51155601061 has 4 divisors (see below), whose sum is σ = 51211266400. Its totient is φ = 51099935724.

The previous prime is 51155601043. The next prime is 51155601089. The reversal of 51155601061 is 16010655115.

51155601061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51155601061 - 2³⁵ = 16795862693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51155601031) 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, 27831291 + ... + 27833128.

It is an arithmetic number, because the mean of its divisors is an integer number (12802816600).

Almost surely, 2^51155601061 is an apocalyptic number.

It is an amenable number.

51155601061 is a deficient number, since it is larger than the sum of its proper divisors (55665339).

51155601061 is an equidigital number, since it uses as much as digits as its factorization.

51155601061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55665338.

The product of its (nonzero) digits is 4500, while the sum is 31.

The spelling of 51155601061 in words is "fifty-one billion, one hundred fifty-five million, six hundred one thousand, sixty-one".