2646940433 has 4 divisors (see below), whose sum is σ = 2653412580. Its totient is φ = 2640468288.

The previous prime is 2646940411. The next prime is 2646940451. The reversal of 2646940433 is 3340496462.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3340496462 = 2 ⋅1670248231.

It can be written as a sum of positive squares in 2 ways, for example, as 1391513809 + 1255426624 = 37303^2 + 35432^2 .

It is a cyclic number.

It is not a de Polignac number, because 2646940433 - 2²² = 2642746129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2646940463) 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, 3235460 + ... + 3236277.

It is an arithmetic number, because the mean of its divisors is an integer number (663353145).

Almost surely, 2^2646940433 is an apocalyptic number.

It is an amenable number.

2646940433 is a deficient number, since it is larger than the sum of its proper divisors (6472147).

2646940433 is an equidigital number, since it uses as much as digits as its factorization.

2646940433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6472146.

The product of its (nonzero) digits is 373248, while the sum is 41.

The square root of 2646940433 is about 51448.4249807514. The cubic root of 2646940433 is about 1383.2947308852.

The spelling of 2646940433 in words is "two billion, six hundred forty-six million, nine hundred forty thousand, four hundred thirty-three".