81552001132469 has 8 divisors (see below), whose sum is σ = 93213602151168. Its totient is φ = 69893228899440.

The previous prime is 81552001132409. The next prime is 81552001132471. The reversal of 81552001132469 is 96423110025518.

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 81552001132469 - 2²⁰ = 81552000083893 is a prime.

It is a super-2 number, since 2×81552001132469² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81552001132409) 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, 707134637 + ... + 707249954.

It is an arithmetic number, because the mean of its divisors is an integer number (11651700268896).

Almost surely, 2^{81552001132469} is an apocalyptic number.

It is an amenable number.

81552001132469 is a deficient number, since it is larger than the sum of its proper divisors (11661601018699).

81552001132469 is a wasteful number, since it uses less digits than its factorization.

81552001132469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1414392835.

The product of its (nonzero) digits is 518400, while the sum is 47.

The spelling of 81552001132469 in words is "eighty-one trillion, five hundred fifty-two billion, one million, one hundred thirty-two thousand, four hundred sixty-nine".