2640397199 has 4 divisors (see below), whose sum is σ = 2880433320. Its totient is φ = 2400361080.

The previous prime is 2640397189. The next prime is 2640397229. The reversal of 2640397199 is 9917930462.

2640397199 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2640397199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640397159) 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, 120018044 + ... + 120018065.

It is an arithmetic number, because the mean of its divisors is an integer number (720108330).

Almost surely, 2^2640397199 is an apocalyptic number.

2640397199 is a deficient number, since it is larger than the sum of its proper divisors (240036121).

2640397199 is a wasteful number, since it uses less digits than its factorization.

2640397199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240036120.

The product of its (nonzero) digits is 734832, while the sum is 50.

The square root of 2640397199 is about 51384.7954068127. The cubic root of 2640397199 is about 1382.1539559909.

The spelling of 2640397199 in words is "two billion, six hundred forty million, three hundred ninety-seven thousand, one hundred ninety-nine".