7746128157 has 4 divisors (see below), whose sum is σ = 10328170880. Its totient is φ = 5164085436.

The previous prime is 7746128101. The next prime is 7746128171. The reversal of 7746128157 is 7518216477.

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.

It is not a de Polignac number, because 7746128157 - 2¹⁴ = 7746111773 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 (7746120157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1291021357 + ... + 1291021362.

It is an arithmetic number, because the mean of its divisors is an integer number (2582042720).

Almost surely, 2^7746128157 is an apocalyptic number.

It is an amenable number.

7746128157 is a deficient number, since it is larger than the sum of its proper divisors (2582042723).

7746128157 is a wasteful number, since it uses less digits than its factorization.

7746128157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2582042722.

The product of its digits is 658560, while the sum is 48.

The square root of 7746128157 is about 88012.0909705025. The cubic root of 7746128157 is about 1978.6161943540.

The spelling of 7746128157 in words is "seven billion, seven hundred forty-six million, one hundred twenty-eight thousand, one hundred fifty-seven".