7972472545 has 4 divisors (see below), whose sum is σ = 9566967060. Its totient is φ = 6377978032.

The previous prime is 7972472513. The next prime is 7972472549. The reversal of 7972472545 is 5452742797.

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 4202021329 + 3770451216 = 64823^2 + 61404^2 .

It is a cyclic number.

It is not a de Polignac number, because 7972472545 - 2⁵ = 7972472513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7972472492 and 7972472501.

It is not an unprimeable number, because it can be changed into a prime (7972472549) 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, 797247250 + ... + 797247259.

It is an arithmetic number, because the mean of its divisors is an integer number (2391741765).

Almost surely, 2^7972472545 is an apocalyptic number.

It is an amenable number.

7972472545 is a deficient number, since it is larger than the sum of its proper divisors (1594494515).

7972472545 is a wasteful number, since it uses less digits than its factorization.

7972472545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1594494514.

The product of its digits is 4939200, while the sum is 52.

The square root of 7972472545 is about 89288.7033448241. The cubic root of 7972472545 is about 1997.7034092616.

The spelling of 7972472545 in words is "seven billion, nine hundred seventy-two million, four hundred seventy-two thousand, five hundred forty-five".