2640238047 has 12 divisors (see below), whose sum is σ = 3814373160. Its totient is φ = 1759837488.

The previous prime is 2640238031. The next prime is 2640238049. The reversal of 2640238047 is 7408320462.

2640238047 is a `hidden beast` number, since 2 + 640 + 2 + 3 + 8 + 0 + 4 + 7 = 666.

It is not a de Polignac number, because 2640238047 - 2⁴ = 2640238031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640238049) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32104 + ... + 79442.

It is an arithmetic number, because the mean of its divisors is an integer number (317864430).

Almost surely, 2^2640238047 is an apocalyptic number.

2640238047 is a deficient number, since it is larger than the sum of its proper divisors (1174135113).

2640238047 is a wasteful number, since it uses less digits than its factorization.

2640238047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53542 (or 53539 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The square root of 2640238047 is about 51383.2467541708. The cubic root of 2640238047 is about 1382.1261852971.

The spelling of 2640238047 in words is "two billion, six hundred forty million, two hundred thirty-eight thousand, forty-seven".