64157682585887 has 4 divisors (see below), whose sum is σ = 69990199184616. Its totient is φ = 58325165987160.

The previous prime is 64157682585851. The next prime is 64157682585901. The reversal of 64157682585887 is 78858528675146.

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 64157682585887 - 2⁶ = 64157682585823 is a prime.

It is a super-2 number, since 2×64157682585887² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64157682585817) 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, 2916258299348 + ... + 2916258299369.

It is an arithmetic number, because the mean of its divisors is an integer number (17497549796154).

Almost surely, 2^{64157682585887} is an apocalyptic number.

64157682585887 is a deficient number, since it is larger than the sum of its proper divisors (5832516598729).

64157682585887 is a wasteful number, since it uses less digits than its factorization.

64157682585887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5832516598728.

The product of its digits is 7225344000, while the sum is 80.

The spelling of 64157682585887 in words is "sixty-four trillion, one hundred fifty-seven billion, six hundred eighty-two million, five hundred eighty-five thousand, eight hundred eighty-seven".