8169540403908 has 144 divisors (see below), whose sum is σ = 21714227539200. Its totient is φ = 2376093339648.

The previous prime is 8169540403907. The next prime is 8169540403909. The reversal of 8169540403908 is 8093040459618.

It is an interprime number because it is at equal distance from previous prime (8169540403907) and next prime (8169540403909).

It is a super-2 number, since 2×8169540403908² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (8169540403907) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25124341 + ... + 25447427.

It is an arithmetic number, because the mean of its divisors is an integer number (150793246800).

Almost surely, 2^{8169540403908} 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 8169540403908, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10857113769600).

8169540403908 is an abundant number, since it is smaller than the sum of its proper divisors (13544687135292).

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

8169540403908 is a wasteful number, since it uses less digits than its factorization.

8169540403908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323594 (or 323573 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 57.

The spelling of 8169540403908 in words is "eight trillion, one hundred sixty-nine billion, five hundred forty million, four hundred three thousand, nine hundred eight".