6505193642 has 4 divisors (see below), whose sum is σ = 9757790466. Its totient is φ = 3252596820.

The previous prime is 6505193627. The next prime is 6505193663. The reversal of 6505193642 is 2463915056.

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

It can be written as a sum of positive squares in only one way, i.e., 5978537041 + 526656601 = 77321^2 + 22949^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6505193642.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1626298409 + ... + 1626298412.

Almost surely, 2^6505193642 is an apocalyptic number.

6505193642 is a deficient number, since it is larger than the sum of its proper divisors (3252596824).

6505193642 is a wasteful number, since it uses less digits than its factorization.

6505193642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3252596823.

The product of its (nonzero) digits is 194400, while the sum is 41.

The square root of 6505193642 is about 80654.7806518622. The cubic root of 6505193642 is about 1866.7525057394.

The spelling of 6505193642 in words is "six billion, five hundred five million, one hundred ninety-three thousand, six hundred forty-two".