8115748865531 has 4 divisors (see below), whose sum is σ = 8377547216064. Its totient is φ = 7853950515000.

The previous prime is 8115748865501. The next prime is 8115748865537. The reversal of 8115748865531 is 1355688475118.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8115748865531 - 2⁶ = 8115748865467 is a prime.

It is a super-2 number, since 2×8115748865531² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8115748865537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130899175220 + ... + 130899175281.

It is an arithmetic number, because the mean of its divisors is an integer number (2094386804016).

Almost surely, 2^{8115748865531} is an apocalyptic number.

8115748865531 is a deficient number, since it is larger than the sum of its proper divisors (261798350533).

8115748865531 is a wasteful number, since it uses less digits than its factorization.

8115748865531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261798350532.

The product of its digits is 32256000, while the sum is 62.

The spelling of 8115748865531 in words is "eight trillion, one hundred fifteen billion, seven hundred forty-eight million, eight hundred sixty-five thousand, five hundred thirty-one".