3994704507515 has 16 divisors (see below), whose sum is σ = 4860599335200. Its totient is φ = 3151150854912.

The previous prime is 3994704507491. The next prime is 3994704507517. The reversal of 3994704507515 is 5157054074993.

It is a cyclic number.

It is not a de Polignac number, because 3994704507515 - 2¹⁶ = 3994704441979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3994704507517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68720 + ... + 2827389.

It is an arithmetic number, because the mean of its divisors is an integer number (303787458450).

Almost surely, 2^{3994704507515} is an apocalyptic number.

3994704507515 is a deficient number, since it is larger than the sum of its proper divisors (865894827685).

3994704507515 is a wasteful number, since it uses less digits than its factorization.

3994704507515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2899966.

The product of its (nonzero) digits is 23814000, while the sum is 59.

The spelling of 3994704507515 in words is "three trillion, nine hundred ninety-four billion, seven hundred four million, five hundred seven thousand, five hundred fifteen".