7840545172 has 12 divisors (see below), whose sum is σ = 14163565696. Its totient is φ = 3793812120.

The previous prime is 7840545113. The next prime is 7840545179. The reversal of 7840545172 is 2715450487.

It is a super-2 number, since 2×7840545172² (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 (7840545179) 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, 31614978 + ... + 31615225.

Almost surely, 2^7840545172 is an apocalyptic number.

It is an amenable number.

7840545172 is a deficient number, since it is larger than the sum of its proper divisors (6323020524).

7840545172 is a wasteful number, since it uses less digits than its factorization.

7840545172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63230238 (or 63230236 counting only the distinct ones).

The product of its (nonzero) digits is 313600, while the sum is 43.

The square root of 7840545172 is about 88546.8529762634. The cubic root of 7840545172 is about 1986.6228227165.

The spelling of 7840545172 in words is "seven billion, eight hundred forty million, five hundred forty-five thousand, one hundred seventy-two".