51111100604 has 6 divisors (see below), whose sum is σ = 89444426064. Its totient is φ = 25555550300.

The previous prime is 51111100583. The next prime is 51111100609. The reversal of 51111100604 is 40600111115.

It is a happy number.

It is a super-2 number, since 2×51111100604² (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 (51111100609) 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 as a sum of consecutive naturals, namely, 6388887572 + ... + 6388887579.

It is an arithmetic number, because the mean of its divisors is an integer number (14907404344).

Almost surely, 2^51111100604 is an apocalyptic number.

It is an amenable number.

51111100604 is a deficient number, since it is larger than the sum of its proper divisors (38333325460).

51111100604 is a wasteful number, since it uses less digits than its factorization.

51111100604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12777775155 (or 12777775153 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 20.

Adding to 51111100604 its reverse (40600111115), we get a palindrome (91711211719).

The spelling of 51111100604 in words is "fifty-one billion, one hundred eleven million, one hundred thousand, six hundred four".