655243136 has 64 divisors (see below), whose sum is σ = 1373328000. Its totient is φ = 310801920.

The previous prime is 655243133. The next prime is 655243153. The reversal of 655243136 is 631342556.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×655243136² = 858687134550228992, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 655243096 and 655243105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655243133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 384815 + ... + 386513.

It is an arithmetic number, because the mean of its divisors is an integer number (21458250).

Almost surely, 2^655243136 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 655243136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (686664000).

655243136 is an abundant number, since it is smaller than the sum of its proper divisors (718084864).

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

655243136 is a wasteful number, since it uses less digits than its factorization.

655243136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1867 (or 1855 counting only the distinct ones).

The product of its digits is 64800, while the sum is 35.

The square root of 655243136 is about 25597.7173982369. The cubic root of 655243136 is about 868.5620037561.

The spelling of 655243136 in words is "six hundred fifty-five million, two hundred forty-three thousand, one hundred thirty-six".