2640363542 has 4 divisors (see below), whose sum is σ = 3960545316. Its totient is φ = 1320181770.

The previous prime is 2640363533. The next prime is 2640363559. The reversal of 2640363542 is 2453630462.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660090884 + ... + 660090887.

It is an arithmetic number, because the mean of its divisors is an integer number (990136329).

Almost surely, 2^2640363542 is an apocalyptic number.

2640363542 is a deficient number, since it is larger than the sum of its proper divisors (1320181774).

2640363542 is a wasteful number, since it uses less digits than its factorization.

2640363542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320181773.

The product of its (nonzero) digits is 103680, while the sum is 35.

The square root of 2640363542 is about 51384.4679061679. The cubic root of 2640363542 is about 1382.1480832188.

The spelling of 2640363542 in words is "two billion, six hundred forty million, three hundred sixty-three thousand, five hundred forty-two".