2642026644 has 36 divisors (see below), whose sum is σ = 7071308244. Its totient is φ = 828870912.

The previous prime is 2642026637. The next prime is 2642026687. The reversal of 2642026644 is 4466202462.

2642026644 is a `hidden beast` number, since 2 + 6 + 4 + 2 + 0 + 2 + 6 + 644 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1223600400 + 1418426244 = 34980^2 + 37662^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2642026599 and 2642026608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2157907 + ... + 2159130.

It is an arithmetic number, because the mean of its divisors is an integer number (196425229).

Almost surely, 2^2642026644 is an apocalyptic number.

It is an amenable number.

2642026644 is an abundant number, since it is smaller than the sum of its proper divisors (4429281600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2642026644 is a wasteful number, since it uses less digits than its factorization.

2642026644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4317064 (or 4317059 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 36.

The square root of 2642026644 is about 51400.6482838495. The cubic root of 2642026644 is about 1382.4382163452.

The spelling of 2642026644 in words is "two billion, six hundred forty-two million, twenty-six thousand, six hundred forty-four".