815223635856047 has 16 divisors (see below), whose sum is σ = 889692861874464. Its totient is φ = 740814086160000.

The previous prime is 815223635855983. The next prime is 815223635856053. The reversal of 815223635856047 is 740658536322518.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 815223635856047 - 2⁶ = 815223635855983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (815223635856067) 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, 1505774297 + ... + 1506315597.

It is an arithmetic number, because the mean of its divisors is an integer number (55605803867154).

Almost surely, 2^{815223635856047} is an apocalyptic number.

815223635856047 is a deficient number, since it is larger than the sum of its proper divisors (74469226018417).

815223635856047 is a wasteful number, since it uses less digits than its factorization.

815223635856047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596170.

The product of its (nonzero) digits is 290304000, while the sum is 65.

The spelling of 815223635856047 in words is "eight hundred fifteen trillion, two hundred twenty-three billion, six hundred thirty-five million, eight hundred fifty-six thousand, forty-seven".