8156637468 has 240 divisors, whose sum is σ = 26103591360. Its totient is φ = 2167824384.

The previous prime is 8156637431. The next prime is 8156637479. The reversal of 8156637468 is 8647366518.

8156637468 is a `hidden beast` number, since 8 + 1 + 566 + 3 + 74 + 6 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 3430296 + ... + 3432672.

It is an arithmetic number, because the mean of its divisors is an integer number (108764964).

Almost surely, 2^8156637468 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8156637468, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13051795680).

8156637468 is an abundant number, since it is smaller than the sum of its proper divisors (17946953892).

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

8156637468 is a wasteful number, since it uses less digits than its factorization.

8156637468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2506 (or 2495 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 54.

The square root of 8156637468 is about 90314.1044798652. The cubic root of 8156637468 is about 2012.9688450916.

The spelling of 8156637468 in words is "eight billion, one hundred fifty-six million, six hundred thirty-seven thousand, four hundred sixty-eight".