80428571509 has 32 divisors (see below), whose sum is σ = 99641203200. Its totient is φ = 63825485760.

The previous prime is 80428571479. The next prime is 80428571513. The reversal of 80428571509 is 90517582408.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 80428571509 - 2⁵ = 80428571477 is a prime.

It is a super-2 number, since 2×80428571509² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80428572509) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1503382 + ... + 1555960.

It is an arithmetic number, because the mean of its divisors is an integer number (3113787600).

Almost surely, 2^80428571509 is an apocalyptic number.

It is an amenable number.

80428571509 is a deficient number, since it is larger than the sum of its proper divisors (19212631691).

80428571509 is a wasteful number, since it uses less digits than its factorization.

80428571509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53185.

The product of its (nonzero) digits is 806400, while the sum is 49.

The spelling of 80428571509 in words is "eighty billion, four hundred twenty-eight million, five hundred seventy-one thousand, five hundred nine".