2640242913 has 32 divisors (see below), whose sum is σ = 4393128960. Its totient is φ = 1370256960.

The previous prime is 2640242909. The next prime is 2640242921. The reversal of 2640242913 is 3192420462.

It is not a de Polignac number, because 2640242913 - 2² = 2640242909 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (2640242923) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 269383 + ... + 279011.

It is an arithmetic number, because the mean of its divisors is an integer number (137285280).

Almost surely, 2^2640242913 is an apocalyptic number.

It is an amenable number.

2640242913 is a deficient number, since it is larger than the sum of its proper divisors (1752886047).

2640242913 is a wasteful number, since it uses less digits than its factorization.

2640242913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10837.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 2640242913 is about 51383.2941042125. The cubic root of 2640242913 is about 1382.1270343900.

The spelling of 2640242913 in words is "two billion, six hundred forty million, two hundred forty-two thousand, nine hundred thirteen".