64137811587 has 4 divisors (see below), whose sum is σ = 85517082120. Its totient is φ = 42758541056.

The previous prime is 64137811541. The next prime is 64137811603. The reversal of 64137811587 is 78511873146.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64137811587 - 2¹⁴ = 64137795203 is a prime.

It is a super-2 number, since 2×64137811587² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64137810587) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10689635262 + ... + 10689635267.

It is an arithmetic number, because the mean of its divisors is an integer number (21379270530).

Almost surely, 2^64137811587 is an apocalyptic number.

64137811587 is a deficient number, since it is larger than the sum of its proper divisors (21379270533).

64137811587 is a wasteful number, since it uses less digits than its factorization.

64137811587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21379270532.

The product of its digits is 1128960, while the sum is 51.

The spelling of 64137811587 in words is "sixty-four billion, one hundred thirty-seven million, eight hundred eleven thousand, five hundred eighty-seven".