2640220741 has 8 divisors (see below), whose sum is σ = 2726016768. Its totient is φ = 2554464000.

The previous prime is 2640220703. The next prime is 2640220777. The reversal of 2640220741 is 1470220462.

It is a happy number.

2640220741 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2640220741 - 2¹⁵ = 2640187973 is a prime.

It is a super-2 number, since 2×2640220741² = 13941531122413178162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640227741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194661 + ... + 207781.

It is an arithmetic number, because the mean of its divisors is an integer number (340752096).

Almost surely, 2^2640220741 is an apocalyptic number.

It is an amenable number.

2640220741 is a deficient number, since it is larger than the sum of its proper divisors (85796027).

2640220741 is a wasteful number, since it uses less digits than its factorization.

2640220741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19643.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 2640220741 is about 51383.0783527028. The cubic root of 2640220741 is about 1382.1231654775.

The spelling of 2640220741 in words is "two billion, six hundred forty million, two hundred twenty thousand, seven hundred forty-one".