7157121172 has 24 divisors (see below), whose sum is σ = 13187854400. Its totient is φ = 3389268096.

The previous prime is 7157121151. The next prime is 7157121211. The reversal of 7157121172 is 2711217517.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 313729 + ... + 335767.

Almost surely, 2^7157121172 is an apocalyptic number.

It is an amenable number.

7157121172 is a deficient number, since it is larger than the sum of its proper divisors (6030733228).

7157121172 is a wasteful number, since it uses less digits than its factorization.

7157121172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26335 (or 26333 counting only the distinct ones).

The product of its digits is 6860, while the sum is 34.

The square root of 7157121172 is about 84599.7705197833. The cubic root of 7157121172 is about 1927.1378887679.

Adding to 7157121172 its reverse (2711217517), we get a palindrome (9868338689).

The spelling of 7157121172 in words is "seven billion, one hundred fifty-seven million, one hundred twenty-one thousand, one hundred seventy-two".