80691552 has 96 divisors (see below), whose sum is σ = 238462560. Its totient is φ = 26873856.

The previous prime is 80691551. The next prime is 80691557. The reversal of 80691552 is 25519608.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×80691552² = 13022253128337408, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80691551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69408 + ... + 70560.

It is an arithmetic number, because the mean of its divisors is an integer number (2483985).

Almost surely, 2^80691552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80691552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119231280).

80691552 is an abundant number, since it is smaller than the sum of its proper divisors (157771008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80691552 is an equidigital number, since it uses as much as digits as its factorization.

80691552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1184 (or 1158 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 80691552 is about 8982.8476553930. The cubic root of 80691552 is about 432.1249638485.

The spelling of 80691552 in words is "eighty million, six hundred ninety-one thousand, five hundred fifty-two".