128780417485 has 16 divisors (see below), whose sum is σ = 158962325760. Its totient is φ = 100114482240.

The previous prime is 128780417477. The next prime is 128780417531. The reversal of 128780417485 is 584714087821.

It is not a de Polignac number, because 128780417485 - 2³ = 128780417477 is a prime.

It is a super-2 number, since 2×128780417485² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2518245 + ... + 2568874.

It is an arithmetic number, because the mean of its divisors is an integer number (9935145360).

Almost surely, 2^128780417485 is an apocalyptic number.

It is an amenable number.

128780417485 is a deficient number, since it is larger than the sum of its proper divisors (30181908275).

128780417485 is an equidigital number, since it uses as much as digits as its factorization.

128780417485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5087268.

The product of its (nonzero) digits is 4014080, while the sum is 55.

The spelling of 128780417485 in words is "one hundred twenty-eight billion, seven hundred eighty million, four hundred seventeen thousand, four hundred eighty-five".