7645660145 has 4 divisors (see below), whose sum is σ = 9174792180. Its totient is φ = 6116528112.

The previous prime is 7645660133. The next prime is 7645660147. The reversal of 7645660145 is 5410665467.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5410665467 = 67 ⋅80756201.

It can be written as a sum of positive squares in 2 ways, for example, as 2560258801 + 5085401344 = 50599^2 + 71312^2 .

It is a cyclic number.

It is not a de Polignac number, because 7645660145 - 2⁴ = 7645660129 is a prime.

It is a super-2 number, since 2×7645660145² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7645660096 and 7645660105.

It is not an unprimeable number, because it can be changed into a prime (7645660147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 764566010 + ... + 764566019.

It is an arithmetic number, because the mean of its divisors is an integer number (2293698045).

Almost surely, 2^7645660145 is an apocalyptic number.

It is an amenable number.

7645660145 is a deficient number, since it is larger than the sum of its proper divisors (1529132035).

7645660145 is a wasteful number, since it uses less digits than its factorization.

7645660145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1529132034.

The product of its (nonzero) digits is 604800, while the sum is 44.

The square root of 7645660145 is about 87439.4656033533. The cubic root of 7645660145 is about 1970.0246627849.

The spelling of 7645660145 in words is "seven billion, six hundred forty-five million, six hundred sixty thousand, one hundred forty-five".