51640035111 has 16 divisors (see below), whose sum is σ = 87432864000. Its totient is φ = 29508591384.

The previous prime is 51640035101. The next prime is 51640035121. The reversal of 51640035111 is 11153004615.

51640035111 is a `hidden beast` number, since 5 + 1 + 640 + 0 + 3 + 5 + 1 + 11 = 666.

It is an interprime number because it is at equal distance from previous prime (51640035101) and next prime (51640035121).

It is not a de Polignac number, because 51640035111 - 2⁶ = 51640035047 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51640035101) 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, 136613661 + ... + 136614038.

It is an arithmetic number, because the mean of its divisors is an integer number (5464554000).

Almost surely, 2^51640035111 is an apocalyptic number.

51640035111 is a deficient number, since it is larger than the sum of its proper divisors (35792828889).

51640035111 is a wasteful number, since it uses less digits than its factorization.

51640035111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273227715 (or 273227709 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

Adding to 51640035111 its reverse (11153004615), we get a palindrome (62793039726).

The spelling of 51640035111 in words is "fifty-one billion, six hundred forty million, thirty-five thousand, one hundred eleven".