81759299153 has 8 divisors (see below), whose sum is σ = 93539786880. Its totient is φ = 70003958400.

The previous prime is 81759299137. The next prime is 81759299161. The reversal of 81759299153 is 35199295718.

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 81759299153 - 2⁴ = 81759299137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 81759299092 and 81759299101.

It is not an unprimeable number, because it can be changed into a prime (81759299113) 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, 6279773 + ... + 6292778.

It is an arithmetic number, because the mean of its divisors is an integer number (11692473360).

Almost surely, 2^81759299153 is an apocalyptic number.

It is an amenable number.

81759299153 is a deficient number, since it is larger than the sum of its proper divisors (11780487727).

81759299153 is a wasteful number, since it uses less digits than its factorization.

81759299153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12573487.

The product of its digits is 6123600, while the sum is 59.

The spelling of 81759299153 in words is "eighty-one billion, seven hundred fifty-nine million, two hundred ninety-nine thousand, one hundred fifty-three".