8157714977 has 4 divisors (see below), whose sum is σ = 8157902100. Its totient is φ = 8157527856.

The previous prime is 8157714973. The next prime is 8157715021. The reversal of 8157714977 is 7794177518.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6159267361 + 1998447616 = 78481^2 + 44704^2 .

It is a cyclic number.

It is not a de Polignac number, because 8157714977 - 2² = 8157714973 is a prime.

It is a super-2 number, since 2×8157714977² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8157714973) 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, 10163 + ... + 128135.

It is an arithmetic number, because the mean of its divisors is an integer number (2039475525).

Almost surely, 2^8157714977 is an apocalyptic number.

It is an amenable number.

8157714977 is a deficient number, since it is larger than the sum of its proper divisors (187123).

8157714977 is a wasteful number, since it uses less digits than its factorization.

8157714977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187122.

The product of its digits is 3457440, while the sum is 56.

The square root of 8157714977 is about 90320.0696246410. The cubic root of 8157714977 is about 2013.0574803311.

The spelling of 8157714977 in words is "eight billion, one hundred fifty-seven million, seven hundred fourteen thousand, nine hundred seventy-seven".