2642540379 has 4 divisors (see below), whose sum is σ = 3523387176. Its totient is φ = 1761693584.

The previous prime is 2642540377. The next prime is 2642540399. The reversal of 2642540379 is 9730452462.

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

It is a cyclic number.

It is not a de Polignac number, because 2642540379 - 2¹ = 2642540377 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2642540379.

It is not an unprimeable number, because it can be changed into a prime (2642540377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 440423394 + ... + 440423399.

It is an arithmetic number, because the mean of its divisors is an integer number (880846794).

Almost surely, 2^2642540379 is an apocalyptic number.

2642540379 is a deficient number, since it is larger than the sum of its proper divisors (880846797).

2642540379 is an equidigital number, since it uses as much as digits as its factorization.

2642540379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880846796.

The product of its (nonzero) digits is 362880, while the sum is 42.

The square root of 2642540379 is about 51405.6454000920. The cubic root of 2642540379 is about 1382.5278143401.

The spelling of 2642540379 in words is "two billion, six hundred forty-two million, five hundred forty thousand, three hundred seventy-nine".