8161723077 has 16 divisors (see below), whose sum is σ = 10971132480. Its totient is φ = 5396799872.

The previous prime is 8161723067. The next prime is 8161723109. The reversal of 8161723077 is 7703271618.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 8161723077 - 2⁶ = 8161723013 is a prime.

It is a super-2 number, since 2×8161723077² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8161723067) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 509563 + ... + 525335.

It is an arithmetic number, because the mean of its divisors is an integer number (685695780).

Almost surely, 2^8161723077 is an apocalyptic number.

It is an amenable number.

8161723077 is a deficient number, since it is larger than the sum of its proper divisors (2809409403).

8161723077 is a wasteful number, since it uses less digits than its factorization.

8161723077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17172.

The product of its (nonzero) digits is 98784, while the sum is 42.

The square root of 8161723077 is about 90342.2552131615. The cubic root of 8161723077 is about 2013.3871157189.

The spelling of 8161723077 in words is "eight billion, one hundred sixty-one million, seven hundred twenty-three thousand, seventy-seven".