2640611401 has 4 divisors (see below), whose sum is σ = 2655363600. Its totient is φ = 2625859204.

The previous prime is 2640611359. The next prime is 2640611447. The reversal of 2640611401 is 1041160462.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2640611401 - 2¹⁷ = 2640480329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2640611471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7375831 + ... + 7376188.

It is an arithmetic number, because the mean of its divisors is an integer number (663840900).

Almost surely, 2^2640611401 is an apocalyptic number.

It is an amenable number.

2640611401 is a deficient number, since it is larger than the sum of its proper divisors (14752199).

2640611401 is a wasteful number, since it uses less digits than its factorization.

2640611401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14752198.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 2640611401 is about 51386.8796581384. The cubic root of 2640611401 is about 1382.1913306880.

Adding to 2640611401 its reverse (1041160462), we get a palindrome (3681771863).

The spelling of 2640611401 in words is "two billion, six hundred forty million, six hundred eleven thousand, four hundred one".