2661788636434 has 16 divisors (see below), whose sum is σ = 3999791779200. Its totient is φ = 1328526553104.

The previous prime is 2661788636417. The next prime is 2661788636443. The reversal of 2661788636434 is 4346368871662.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2437047 + ... + 3356005.

It is an arithmetic number, because the mean of its divisors is an integer number (249986986200).

Almost surely, 2^{2661788636434} is an apocalyptic number.

2661788636434 is a deficient number, since it is larger than the sum of its proper divisors (1338003142766).

2661788636434 is a wasteful number, since it uses less digits than its factorization.

2661788636434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921537.

The product of its digits is 167215104, while the sum is 64.

The spelling of 2661788636434 in words is "two trillion, six hundred sixty-one billion, seven hundred eighty-eight million, six hundred thirty-six thousand, four hundred thirty-four".