80911653 has 32 divisors (see below), whose sum is σ = 119180160. Its totient is φ = 48599040.

The previous prime is 80911639. The next prime is 80911661. The reversal of 80911653 is 35611908.

It is not a de Polignac number, because 80911653 - 2¹² = 80907557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80911603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 335613 + ... + 335853.

It is an arithmetic number, because the mean of its divisors is an integer number (3724380).

Almost surely, 2^80911653 is an apocalyptic number.

It is an amenable number.

80911653 is a deficient number, since it is larger than the sum of its proper divisors (38268507).

80911653 is a wasteful number, since it uses less digits than its factorization.

80911653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 80911653 is about 8995.0904942641. The cubic root of 80911653 is about 432.5175071711.

The spelling of 80911653 in words is "eighty million, nine hundred eleven thousand, six hundred fifty-three".