8501172057 has 12 divisors (see below), whose sum is σ = 14033680960. Its totient is φ = 4857812568.

The previous prime is 8501172041. The next prime is 8501172151. The reversal of 8501172057 is 7502711058.

It is not a de Polignac number, because 8501172057 - 2⁴ = 8501172041 is a prime.

It is a super-2 number, since 2×8501172057² (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 (8501172037) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67469557 + ... + 67469682.

Almost surely, 2^8501172057 is an apocalyptic number.

It is an amenable number.

8501172057 is a deficient number, since it is larger than the sum of its proper divisors (5532508903).

8501172057 is a wasteful number, since it uses less digits than its factorization.

8501172057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134939252 (or 134939249 counting only the distinct ones).

The product of its (nonzero) digits is 19600, while the sum is 36.

The square root of 8501172057 is about 92201.8007253654. The cubic root of 8501172057 is about 2040.9213492443.

The spelling of 8501172057 in words is "eight billion, five hundred one million, one hundred seventy-two thousand, fifty-seven".