655421153604 has 96 divisors (see below), whose sum is σ = 1761889409280. Its totient is φ = 185758175232.

The previous prime is 655421153599. The next prime is 655421153623. The reversal of 655421153604 is 406351124556.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5517912 + ... + 5635440.

It is an arithmetic number, because the mean of its divisors is an integer number (18353014680).

Almost surely, 2^655421153604 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 655421153604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (880944704640).

655421153604 is an abundant number, since it is smaller than the sum of its proper divisors (1106468255676).

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

655421153604 is a wasteful number, since it uses less digits than its factorization.

655421153604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118077 (or 118075 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 42.

The spelling of 655421153604 in words is "six hundred fifty-five billion, four hundred twenty-one million, one hundred fifty-three thousand, six hundred four".