2626128157 has 4 divisors (see below), whose sum is σ = 2626230816. Its totient is φ = 2626025500.

The previous prime is 2626128137. The next prime is 2626128161. The reversal of 2626128157 is 7518216262.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2626128157 - 2¹¹ = 2626126109 is a prime.

It is a super-3 number, since 3×2626128157³ (a number of 29 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2626128137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21282 + ... + 75532.

It is an arithmetic number, because the mean of its divisors is an integer number (656557704).

Almost surely, 2^2626128157 is an apocalyptic number.

It is an amenable number.

2626128157 is a deficient number, since it is larger than the sum of its proper divisors (102659).

2626128157 is an equidigital number, since it uses as much as digits as its factorization.

2626128157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102658.

The product of its digits is 80640, while the sum is 40.

The square root of 2626128157 is about 51245.7623321187. The cubic root of 2626128157 is about 1379.6596789104.

The spelling of 2626128157 in words is "two billion, six hundred twenty-six million, one hundred twenty-eight thousand, one hundred fifty-seven".