3999505047525 has 120 divisors (see below), whose sum is σ = 8148102488064. Its totient is φ = 1927093161600.

The previous prime is 3999505047523. The next prime is 3999505047533. The reversal of 3999505047525 is 5257405059993.

3999505047525 is a `hidden beast` number, since 3 + 9 + 9 + 9 + 50 + 50 + 4 + 7 + 525 = 666.

It is not a de Polignac number, because 3999505047525 - 2¹ = 3999505047523 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3999505047523) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 378981 + ... + 2853530.

Almost surely, 2^{3999505047525} is an apocalyptic number.

It is an amenable number.

3999505047525 is an abundant number, since it is smaller than the sum of its proper divisors (4148597440539).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3999505047525 is a wasteful number, since it uses less digits than its factorization.

3999505047525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3232593 (or 3232579 counting only the distinct ones).

The product of its (nonzero) digits is 76545000, while the sum is 63.

The spelling of 3999505047525 in words is "three trillion, nine hundred ninety-nine billion, five hundred five million, forty-seven thousand, five hundred twenty-five".