2115542403646 has 16 divisors (see below), whose sum is σ = 3817520127360. Its totient is φ = 858942028440.

The previous prime is 2115542403643. The next prime is 2115542403659. The reversal of 2115542403646 is 6463042455112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2115542403643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3976583200 + ... + 3976583731.

It is an arithmetic number, because the mean of its divisors is an integer number (238595007960).

Almost surely, 2^{2115542403646} is an apocalyptic number.

2115542403646 is a deficient number, since it is larger than the sum of its proper divisors (1701977723714).

2115542403646 is a wasteful number, since it uses less digits than its factorization.

2115542403646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7953166959.

The product of its (nonzero) digits is 691200, while the sum is 43.

Adding to 2115542403646 its reverse (6463042455112), we get a palindrome (8578584858758).

The spelling of 2115542403646 in words is "two trillion, one hundred fifteen billion, five hundred forty-two million, four hundred three thousand, six hundred forty-six".