2640005452642 has 8 divisors (see below), whose sum is σ = 3960058977756. Its totient is φ = 1319985793392.

The previous prime is 2640005452639. The next prime is 2640005452661. The reversal of 2640005452642 is 2462545000462.

It can be written as a sum of positive squares in 2 ways, for example, as 2351809340721 + 288196111921 = 1533561^2 + 536839^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 2640005452595 and 2640005452604.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8270673 + ... + 8583940.

Almost surely, 2^{2640005452642} is an apocalyptic number.

2640005452642 is a deficient number, since it is larger than the sum of its proper divisors (1320053525114).

2640005452642 is a wasteful number, since it uses less digits than its factorization.

2640005452642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16932932.

The product of its (nonzero) digits is 460800, while the sum is 40.

The spelling of 2640005452642 in words is "two trillion, six hundred forty billion, five million, four hundred fifty-two thousand, six hundred forty-two".