28156714655799 has 16 divisors (see below), whose sum is σ = 38754957194240. Its totient is φ = 18164858532480.

The previous prime is 28156714655791. The next prime is 28156714655801. The reversal of 28156714655799 is 99755641765182.

It is not a de Polignac number, because 28156714655799 - 2³ = 28156714655791 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28156714655799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28156714655791) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4137394 + ... + 8569215.

It is an arithmetic number, because the mean of its divisors is an integer number (2422184824640).

Almost surely, 2^{28156714655799} is an apocalyptic number.

28156714655799 is a deficient number, since it is larger than the sum of its proper divisors (10598242538441).

28156714655799 is a wasteful number, since it uses less digits than its factorization.

28156714655799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12730470.

The product of its digits is 1143072000, while the sum is 75.

The spelling of 28156714655799 in words is "twenty-eight trillion, one hundred fifty-six billion, seven hundred fourteen million, six hundred fifty-five thousand, seven hundred ninety-nine".