51105550061 has 8 divisors (see below), whose sum is σ = 52760418048. Its totient is φ = 49451076000.

The previous prime is 51105550057. The next prime is 51105550087. The reversal of 51105550061 is 16005550115.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51105550061 - 2² = 51105550057 is a prime.

It is a super-2 number, since 2×51105550061² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51105550021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177506 + ... + 365676.

It is an arithmetic number, because the mean of its divisors is an integer number (6595052256).

Almost surely, 2^51105550061 is an apocalyptic number.

It is an amenable number.

51105550061 is a deficient number, since it is larger than the sum of its proper divisors (1654867987).

51105550061 is a wasteful number, since it uses less digits than its factorization.

51105550061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196963.

The product of its (nonzero) digits is 3750, while the sum is 29.

The spelling of 51105550061 in words is "fifty-one billion, one hundred five million, five hundred fifty thousand, sixty-one".