8001515645 has 8 divisors (see below), whose sum is σ = 9605448504. Its totient is φ = 6398792704.

The previous prime is 8001515573. The next prime is 8001515651. The reversal of 8001515645 is 5465151008.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3936433081 + 4065082564 = 62741^2 + 63758^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8001515645 is a prime.

It is a Duffinian number.

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, 287864 + ... + 314433.

It is an arithmetic number, because the mean of its divisors is an integer number (1200681063).

Almost surely, 2^8001515645 is an apocalyptic number.

It is an amenable number.

8001515645 is a deficient number, since it is larger than the sum of its proper divisors (1603932859).

8001515645 is a wasteful number, since it uses less digits than its factorization.

8001515645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604959.

The product of its (nonzero) digits is 24000, while the sum is 35.

The square root of 8001515645 is about 89451.1914118532. The cubic root of 8001515645 is about 2000.1262957745.

The spelling of 8001515645 in words is "eight billion, one million, five hundred fifteen thousand, six hundred forty-five".