51111010636 has 24 divisors (see below), whose sum is σ = 102227844096. Its totient is φ = 21903471120.

The previous prime is 51111010631. The next prime is 51111010651. The reversal of 51111010636 is 63601011115.

It is a super-2 number, since 2×51111010636² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51111010636.

It is not an unprimeable number, because it can be changed into a prime (51111010631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 585471 + ... + 667081.

It is an arithmetic number, because the mean of its divisors is an integer number (4259493504).

Almost surely, 2^51111010636 is an apocalyptic number.

It is an amenable number.

51111010636 is an abundant number, since it is smaller than the sum of its proper divisors (51116833460).

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

51111010636 is a wasteful number, since it uses less digits than its factorization.

51111010636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103989 (or 103987 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 25.

The spelling of 51111010636 in words is "fifty-one billion, one hundred eleven million, ten thousand, six hundred thirty-six".