2606440651 has 4 divisors (see below), whose sum is σ = 2608706304. Its totient is φ = 2604175000.

The previous prime is 2606440649. The next prime is 2606440679. The reversal of 2606440651 is 1560446062.

2606440651 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 2606440651 - 2¹ = 2606440649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2606440621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1131100 + ... + 1133401.

It is an arithmetic number, because the mean of its divisors is an integer number (652176576).

Almost surely, 2^2606440651 is an apocalyptic number.

2606440651 is a deficient number, since it is larger than the sum of its proper divisors (2265653).

2606440651 is a wasteful number, since it uses less digits than its factorization.

2606440651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2265652.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 2606440651 is about 51053.3118514362. The cubic root of 2606440651 is about 1376.2033588466.

The spelling of 2606440651 in words is "two billion, six hundred six million, four hundred forty thousand, six hundred fifty-one".