40640660251111 has 4 divisors (see below), whose sum is σ = 41739056474152. Its totient is φ = 39542264028072.

The previous prime is 40640660251049. The next prime is 40640660251127. The reversal of 40640660251111 is 11115206604604.

40640660251111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40640660251111 - 2⁴⁵ = 5456288162279 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 1098396223003 = 40640660251111 / (4 + 0 + 6 + 4 + 0 + 6 + 6 + 0 + 2 + 5 + 1 + 1 + 1 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40640660251141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 549198111465 + ... + 549198111538.

It is an arithmetic number, because the mean of its divisors is an integer number (10434764118538).

Almost surely, 2^{40640660251111} is an apocalyptic number.

40640660251111 is a deficient number, since it is larger than the sum of its proper divisors (1098396223041).

40640660251111 is a wasteful number, since it uses less digits than its factorization.

40640660251111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1098396223040.

The product of its (nonzero) digits is 34560, while the sum is 37.

Adding to 40640660251111 its reverse (11115206604604), we get a palindrome (51755866855715).

The spelling of 40640660251111 in words is "forty trillion, six hundred forty billion, six hundred sixty million, two hundred fifty-one thousand, one hundred eleven".