51106813660 has 48 divisors (see below), whose sum is σ = 122690179584. Its totient is φ = 17517503808.

The previous prime is 51106813649. The next prime is 51106813661. The reversal of 51106813660 is 6631860115.

It is a super-2 number, since 2×51106813660² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51106813661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 478927 + ... + 575833.

It is an arithmetic number, because the mean of its divisors is an integer number (2556045408).

Almost surely, 2^51106813660 is an apocalyptic number.

It is an amenable number.

51106813660 is an abundant number, since it is smaller than the sum of its proper divisors (71583365924).

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

51106813660 is a wasteful number, since it uses less digits than its factorization.

51106813660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100690 (or 100688 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 51106813660 in words is "fifty-one billion, one hundred six million, eight hundred thirteen thousand, six hundred sixty".