2640461652 has 60 divisors (see below), whose sum is σ = 6908511456. Its totient is φ = 879411600.

The previous prime is 2640461587. The next prime is 2640461657. The reversal of 2640461652 is 2561640462.

2640461652 is a `hidden beast` number, since 2 + 640 + 4 + 6 + 1 + 6 + 5 + 2 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640461657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 490777 + ... + 496127.

Almost surely, 2^2640461652 is an apocalyptic number.

It is an amenable number.

2640461652 is an abundant number, since it is smaller than the sum of its proper divisors (4268049804).

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

2640461652 is a wasteful number, since it uses less digits than its factorization.

2640461652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6890 (or 6879 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 2640461652 is about 51385.4225632134. The cubic root of 2640461652 is about 1382.1652021832.

The spelling of 2640461652 in words is "two billion, six hundred forty million, four hundred sixty-one thousand, six hundred fifty-two".