221136425604 has 144 divisors (see below), whose sum is σ = 591344732160. Its totient is φ = 69573461760.

The previous prime is 221136425591. The next prime is 221136425621. The reversal of 221136425604 is 406524631122.

221136425604 is a `hidden beast` number, since 2 + 2 + 1 + 1 + 3 + 6 + 42 + 5 + 604 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15361242 + ... + 15375630.

It is an arithmetic number, because the mean of its divisors is an integer number (4106560640).

Almost surely, 2^221136425604 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 221136425604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (295672366080).

221136425604 is an abundant number, since it is smaller than the sum of its proper divisors (370208306556).

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

221136425604 is a wasteful number, since it uses less digits than its factorization.

221136425604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14770 (or 14765 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 221136425604 in words is "two hundred twenty-one billion, one hundred thirty-six million, four hundred twenty-five thousand, six hundred four".