40215515532545 has 8 divisors (see below), whose sum is σ = 48446395366824. Its totient is φ = 32047227940864.

The previous prime is 40215515532527. The next prime is 40215515532557. The reversal of 40215515532545 is 54523551551204.

It can be written as a sum of positive squares in 4 ways, for example, as 11745692985601 + 28469822546944 = 3427199^2 + 5335712^2 .

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 40215515532545 - 2¹⁸ = 40215515270401 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 40215515532545.

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, 15648059234 + ... + 15648061803.

It is an arithmetic number, because the mean of its divisors is an integer number (6055799420853).

Almost surely, 2^{40215515532545} is an apocalyptic number.

It is an amenable number.

40215515532545 is a deficient number, since it is larger than the sum of its proper divisors (8230879834279).

40215515532545 is a wasteful number, since it uses less digits than its factorization.

40215515532545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31296121299.

The product of its (nonzero) digits is 3000000, while the sum is 47.

The spelling of 40215515532545 in words is "forty trillion, two hundred fifteen billion, five hundred fifteen million, five hundred thirty-two thousand, five hundred forty-five".