80145520491 has 16 divisors (see below), whose sum is σ = 113050208000. Its totient is φ = 50363853408.

The previous prime is 80145520487. The next prime is 80145520517. The reversal of 80145520491 is 19402554108.

It is not a de Polignac number, because 80145520491 - 2² = 80145520487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80145520421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3521476 + ... + 3544161.

It is an arithmetic number, because the mean of its divisors is an integer number (7065638000).

Almost surely, 2^80145520491 is an apocalyptic number.

80145520491 is a deficient number, since it is larger than the sum of its proper divisors (32904687509).

80145520491 is a wasteful number, since it uses less digits than its factorization.

80145520491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7065858.

The product of its (nonzero) digits is 57600, while the sum is 39.

The spelling of 80145520491 in words is "eighty billion, one hundred forty-five million, five hundred twenty thousand, four hundred ninety-one".