64117436987 has 8 divisors (see below), whose sum is σ = 66449658000. Its totient is φ = 61793301024.

The previous prime is 64117436983. The next prime is 64117437029. The reversal of 64117436987 is 78963471146.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64117436987 - 2² = 64117436983 is a prime.

It is a super-2 number, since 2×64117436987² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64117436983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2005112 + ... + 2036837.

It is an arithmetic number, because the mean of its divisors is an integer number (8306207250).

Almost surely, 2^64117436987 is an apocalyptic number.

64117436987 is a deficient number, since it is larger than the sum of its proper divisors (2332221013).

64117436987 is a wasteful number, since it uses less digits than its factorization.

64117436987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4042525.

The product of its digits is 6096384, while the sum is 56.

The spelling of 64117436987 in words is "sixty-four billion, one hundred seventeen million, four hundred thirty-six thousand, nine hundred eighty-seven".