128138350037415 has 8 divisors (see below), whose sum is σ = 205021360059888. Its totient is φ = 68340453353280.

The previous prime is 128138350037413. The next prime is 128138350037419. The reversal of 128138350037415 is 514730053831821.

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

It is not a de Polignac number, because 128138350037415 - 2¹ = 128138350037413 is a prime.

It is a super-2 number, since 2×128138350037415² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128138350037413) 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, 4271278334566 + ... + 4271278334595.

It is an arithmetic number, because the mean of its divisors is an integer number (25627670007486).

Almost surely, 2^{128138350037415} is an apocalyptic number.

128138350037415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128138350037415 is a deficient number, since it is larger than the sum of its proper divisors (76883010022473).

128138350037415 is an equidigital number, since it uses as much as digits as its factorization.

128138350037415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8542556669169.

The product of its (nonzero) digits is 2419200, while the sum is 51.

The spelling of 128138350037415 in words is "one hundred twenty-eight trillion, one hundred thirty-eight billion, three hundred fifty million, thirty-seven thousand, four hundred fifteen".