87781655783723 has 16 divisors (see below), whose sum is σ = 97804018308096. Its totient is φ = 78099826050240.

The previous prime is 87781655783669. The next prime is 87781655783803. The reversal of 87781655783723 is 32738755618778.

It is a cyclic number.

It is not a de Polignac number, because 87781655783723 - 2⁸ = 87781655783467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87781655780723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6631415 + ... + 14816847.

It is an arithmetic number, because the mean of its divisors is an integer number (6112751144256).

Almost surely, 2^{87781655783723} is an apocalyptic number.

87781655783723 is a deficient number, since it is larger than the sum of its proper divisors (10022362524373).

87781655783723 is a wasteful number, since it uses less digits than its factorization.

87781655783723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8206234.

The product of its digits is 3319142400, while the sum is 77.

The spelling of 87781655783723 in words is "eighty-seven trillion, seven hundred eighty-one billion, six hundred fifty-five million, seven hundred eighty-three thousand, seven hundred twenty-three".