128746551 has 8 divisors (see below), whose sum is σ = 171944560. Its totient is φ = 85689792.

The previous prime is 128746543. The next prime is 128746561. The reversal of 128746551 is 155647821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 128746551 - 2³ = 128746543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128746511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33166 + ... + 36843.

It is an arithmetic number, because the mean of its divisors is an integer number (21493070).

Almost surely, 2^128746551 is an apocalyptic number.

128746551 is a deficient number, since it is larger than the sum of its proper divisors (43198009).

128746551 is an equidigital number, since it uses as much as digits as its factorization.

128746551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70625.

The product of its digits is 67200, while the sum is 39.

The square root of 128746551 is about 11346.6537357937. The cubic root of 128746551 is about 504.9463080517.

The spelling of 128746551 in words is "one hundred twenty-eight million, seven hundred forty-six thousand, five hundred fifty-one".