5165421687 has 12 divisors (see below), whose sum is σ = 7463681784. Its totient is φ = 3442452720.

The previous prime is 5165421671. The next prime is 5165421697. The reversal of 5165421687 is 7861245615.

5165421687 is a `hidden beast` number, since 5 + 16 + 542 + 16 + 87 = 666.

It is not a de Polignac number, because 5165421687 - 2⁴ = 5165421671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5165421617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68208 + ... + 122405.

It is an arithmetic number, because the mean of its divisors is an integer number (621973482).

Almost surely, 2^5165421687 is an apocalyptic number.

5165421687 is a deficient number, since it is larger than the sum of its proper divisors (2298260097).

5165421687 is a wasteful number, since it uses less digits than its factorization.

5165421687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193630 (or 193627 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

The square root of 5165421687 is about 71870.8681386276. The cubic root of 5165421687 is about 1728.6295278546.

The spelling of 5165421687 in words is "five billion, one hundred sixty-five million, four hundred twenty-one thousand, six hundred eighty-seven".