2505351987 has 48 divisors (see below), whose sum is σ = 3757178880. Its totient is φ = 1607993856.

The previous prime is 2505351943. The next prime is 2505352037. The reversal of 2505351987 is 7891535052.

2505351987 is a `hidden beast` number, since 2 + 5 + 0 + 53 + 519 + 87 = 666.

It is not a de Polignac number, because 2505351987 - 2¹¹ = 2505349939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2505351917) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6541198 + ... + 6541580.

It is an arithmetic number, because the mean of its divisors is an integer number (78274560).

Almost surely, 2^2505351987 is an apocalyptic number.

2505351987 is a deficient number, since it is larger than the sum of its proper divisors (1251826893).

2505351987 is a wasteful number, since it uses less digits than its factorization.

2505351987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672 (or 669 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 45.

The square root of 2505351987 is about 50053.4912568544. The cubic root of 2505351987 is about 1358.1766198501.

The spelling of 2505351987 in words is "two billion, five hundred five million, three hundred fifty-one thousand, nine hundred eighty-seven".