6634438587 has 48 divisors (see below), whose sum is σ = 11406799872. Its totient is φ = 3636601920.

The previous prime is 6634438561. The next prime is 6634438589. The reversal of 6634438587 is 7858344366.

It is not a de Polignac number, because 6634438587 - 2⁸ = 6634438331 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6634438589) 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, 145458 + ... + 185544.

It is an arithmetic number, because the mean of its divisors is an integer number (237641664).

Almost surely, 2^6634438587 is an apocalyptic number.

6634438587 is a deficient number, since it is larger than the sum of its proper divisors (4772361285).

6634438587 is a wasteful number, since it uses less digits than its factorization.

6634438587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40208 (or 40205 counting only the distinct ones).

The product of its digits is 11612160, while the sum is 54.

The square root of 6634438587 is about 81452.0631230419. The cubic root of 6634438587 is about 1879.0343791526.

The spelling of 6634438587 in words is "six billion, six hundred thirty-four million, four hundred thirty-eight thousand, five hundred eighty-seven".