8157693077 has 4 divisors (see below), whose sum is σ = 8158364556. Its totient is φ = 8157021600.

The previous prime is 8157693041. The next prime is 8157693079. The reversal of 8157693077 is 7703967518.

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 2998000516 + 5159692561 = 54754^2 + 71831^2 .

It is a cyclic number.

It is not a de Polignac number, because 8157693077 - 2¹⁴ = 8157676693 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 (8157693079) 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, 317174 + ... + 341927.

It is an arithmetic number, because the mean of its divisors is an integer number (2039591139).

Almost surely, 2^8157693077 is an apocalyptic number.

It is an amenable number.

8157693077 is a deficient number, since it is larger than the sum of its proper divisors (671479).

8157693077 is a wasteful number, since it uses less digits than its factorization.

8157693077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671478.

The product of its (nonzero) digits is 2222640, while the sum is 53.

The square root of 8157693077 is about 90319.9483890464. The cubic root of 8157693077 is about 2013.0556789280.

The spelling of 8157693077 in words is "eight billion, one hundred fifty-seven million, six hundred ninety-three thousand, seventy-seven".