128680761 has 16 divisors (see below), whose sum is σ = 187777728. Its totient is φ = 77736000.

The previous prime is 128680759. The next prime is 128680771. The reversal of 128680761 is 167086821.

It is not a de Polignac number, because 128680761 - 2¹ = 128680759 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128680751) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4311 + ... + 16611.

It is an arithmetic number, because the mean of its divisors is an integer number (11736108).

Almost surely, 2^128680761 is an apocalyptic number.

128680761 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

128680761 is a deficient number, since it is larger than the sum of its proper divisors (59096967).

128680761 is a wasteful number, since it uses less digits than its factorization.

128680761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12632.

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 128680761 is about 11343.7542727265. The cubic root of 128680761 is about 504.8602835394.

The spelling of 128680761 in words is "one hundred twenty-eight million, six hundred eighty thousand, seven hundred sixty-one".