7245571657 has 8 divisors (see below), whose sum is σ = 7443732296. Its totient is φ = 7047533952.

The previous prime is 7245571651. The next prime is 7245571667. The reversal of 7245571657 is 7561755427.

It can be written as a sum of positive squares in 4 ways, for example, as 4753964601 + 2491607056 = 68949^2 + 49916^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7245571657 - 2¹⁵ = 7245538889 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7245571657.

It is not an unprimeable number, because it can be changed into a prime (7245571651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95773 + ... + 153829.

It is an arithmetic number, because the mean of its divisors is an integer number (930466537).

Almost surely, 2^7245571657 is an apocalyptic number.

It is an amenable number.

7245571657 is a deficient number, since it is larger than the sum of its proper divisors (198160639).

7245571657 is a wasteful number, since it uses less digits than its factorization.

7245571657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61467.

The product of its digits is 2058000, while the sum is 49.

The square root of 7245571657 is about 85120.9237320648. The cubic root of 7245571657 is about 1935.0441809871.

The spelling of 7245571657 in words is "seven billion, two hundred forty-five million, five hundred seventy-one thousand, six hundred fifty-seven".