81153373647 has 8 divisors (see below), whose sum is σ = 108212405040. Its totient is φ = 54098295680.

The previous prime is 81153373621. The next prime is 81153373663. The reversal of 81153373647 is 74637335118.

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

It is a cyclic number.

It is not a de Polignac number, because 81153373647 - 2⁷ = 81153373519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81153373596 and 81153373605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81153372647) 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, 940122 + ... + 1022807.

It is an arithmetic number, because the mean of its divisors is an integer number (13526550630).

Almost surely, 2^81153373647 is an apocalyptic number.

81153373647 is a deficient number, since it is larger than the sum of its proper divisors (27059031393).

81153373647 is a wasteful number, since it uses less digits than its factorization.

81153373647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1976713.

The product of its digits is 1270080, while the sum is 48.

The spelling of 81153373647 in words is "eighty-one billion, one hundred fifty-three million, three hundred seventy-three thousand, six hundred forty-seven".