64158863615 has 32 divisors (see below), whose sum is σ = 96005758464. Its totient is φ = 39987872640.

The previous prime is 64158863609. The next prime is 64158863627. The reversal of 64158863615 is 51636885146.

It is a happy number.

It is a Cunningham number, because it is equal to 253296²-1.

It is not a de Polignac number, because 64158863615 - 2¹⁸ = 64158601471 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2774732 + ... + 2797758.

It is an arithmetic number, because the mean of its divisors is an integer number (3000179952).

Almost surely, 2^64158863615 is an apocalyptic number.

64158863615 is a deficient number, since it is larger than the sum of its proper divisors (31846894849).

64158863615 is a wasteful number, since it uses less digits than its factorization.

64158863615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30287.

The product of its digits is 4147200, while the sum is 53.

The spelling of 64158863615 in words is "sixty-four billion, one hundred fifty-eight million, eight hundred sixty-three thousand, six hundred fifteen".