3842561817615 has 16 divisors (see below), whose sum is σ = 6509751785568. Its totient is φ = 1928815343616.

The previous prime is 3842561817583. The next prime is 3842561817641. The reversal of 3842561817615 is 5167181652483.

It is a happy number.

It is not a de Polignac number, because 3842561817615 - 2⁵ = 3842561817583 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7534434682 + ... + 7534435191.

It is an arithmetic number, because the mean of its divisors is an integer number (406859486598).

Almost surely, 2^{3842561817615} is an apocalyptic number.

3842561817615 is a deficient number, since it is larger than the sum of its proper divisors (2667189967953).

3842561817615 is a wasteful number, since it uses less digits than its factorization.

3842561817615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15068869898.

The product of its digits is 9676800, while the sum is 57.

The spelling of 3842561817615 in words is "three trillion, eight hundred forty-two billion, five hundred sixty-one million, eight hundred seventeen thousand, six hundred fifteen".