8158491256320 has 240 divisors, whose sum is σ = 28258618042512. Its totient is φ = 2175330631680.

The previous prime is 8158491256313. The next prime is 8158491256327. The reversal of 8158491256320 is 236521948518.

8158491256320 is a `hidden beast` number, since 8 + 1 + 5 + 8 + 49 + 12 + 563 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (8158491256313) and next prime (8158491256327).

It is a tau number, because it is divible by the number of its divisors (240).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8158491256327) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 250221139 + ... + 250253741.

Almost surely, 2^{8158491256320} is an apocalyptic number.

8158491256320 is a gapful number since it is divisible by the number (80) 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 8158491256320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14129309021256).

8158491256320 is an abundant number, since it is smaller than the sum of its proper divisors (20100126786192).

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

8158491256320 is a wasteful number, since it uses less digits than its factorization.

8158491256320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43493 (or 43474 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 54.

The spelling of 8158491256320 in words is "eight trillion, one hundred fifty-eight billion, four hundred ninety-one million, two hundred fifty-six thousand, three hundred twenty".