158694563664 has 1280 divisors, whose sum is σ = 621338009600. Its totient is φ = 38093690880.

The previous prime is 158694563591. The next prime is 158694563723. The reversal of 158694563664 is 466365496851.

158694563664 is a `hidden beast` number, since 1 + 5 + 8 + 6 + 9 + 4 + 563 + 6 + 64 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 2601550194 + ... + 2601550254.

It is an arithmetic number, because the mean of its divisors is an integer number (485420320).

Almost surely, 2^158694563664 is an apocalyptic number.

158694563664 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 158694563664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (310669004800).

158694563664 is an abundant number, since it is smaller than the sum of its proper divisors (462643445936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

158694563664 is a wasteful number, since it uses less digits than its factorization.

158694563664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172 (or 148 counting only the distinct ones).

The product of its digits is 111974400, while the sum is 63.

The spelling of 158694563664 in words is "one hundred fifty-eight billion, six hundred ninety-four million, five hundred sixty-three thousand, six hundred sixty-four".