81672827315 has 8 divisors (see below), whose sum is σ = 98053832448. Its totient is φ = 65307302080.

The previous prime is 81672827239. The next prime is 81672827317. The reversal of 81672827315 is 51372827618.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 81672827315 - 2⁸ = 81672827059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81672827317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3858362 + ... + 3879471.

It is an arithmetic number, because the mean of its divisors is an integer number (12256729056).

Almost surely, 2^81672827315 is an apocalyptic number.

81672827315 is a deficient number, since it is larger than the sum of its proper divisors (16381005133).

81672827315 is a wasteful number, since it uses less digits than its factorization.

81672827315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7739949.

The product of its digits is 1128960, while the sum is 50.

The spelling of 81672827315 in words is "eighty-one billion, six hundred seventy-two million, eight hundred twenty-seven thousand, three hundred fifteen".