8613151638 has 64 divisors (see below), whose sum is σ = 21282573312. Its totient is φ = 2262925440.

The previous prime is 8613151633. The next prime is 8613151691. The reversal of 8613151638 is 8361513168.

It is a super-2 number, since 2×8613151638² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 8613151638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8613151633) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 113608 + ... + 173588.

It is an arithmetic number, because the mean of its divisors is an integer number (332540208).

Almost surely, 2^8613151638 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8613151638, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10641286656).

8613151638 is an abundant number, since it is smaller than the sum of its proper divisors (12669421674).

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

8613151638 is a wasteful number, since it uses less digits than its factorization.

8613151638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60269.

The product of its digits is 103680, while the sum is 42.

The square root of 8613151638 is about 92807.0667460189. The cubic root of 8613151638 is about 2049.8434651842.

The spelling of 8613151638 in words is "eight billion, six hundred thirteen million, one hundred fifty-one thousand, six hundred thirty-eight".