8135421594 has 16 divisors (see below), whose sum is σ = 16276681632. Its totient is φ = 2710834128.

The previous prime is 8135421557. The next prime is 8135421599. The reversal of 8135421594 is 4951245318.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8135421599) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225049 + ... + 258684.

It is an arithmetic number, because the mean of its divisors is an integer number (1017292602).

Almost surely, 2^8135421594 is an apocalyptic number.

8135421594 is an abundant number, since it is smaller than the sum of its proper divisors (8141260038).

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

8135421594 is a wasteful number, since it uses less digits than its factorization.

8135421594 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486541.

The product of its digits is 172800, while the sum is 42.

The square root of 8135421594 is about 90196.5719636839. The cubic root of 8135421594 is about 2011.2220478839. Note that the first 3 decimals are identical.

The spelling of 8135421594 in words is "eight billion, one hundred thirty-five million, four hundred twenty-one thousand, five hundred ninety-four".