655181400 has 96 divisors (see below), whose sum is σ = 2037816000. Its totient is φ = 174134400.

The previous prime is 655181383. The next prime is 655181413. The reversal of 655181400 is 4181556.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 196951 + ... + 200249.

It is an arithmetic number, because the mean of its divisors is an integer number (21227250).

Almost surely, 2^655181400 is an apocalyptic number.

655181400 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 655181400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1018908000).

655181400 is an abundant number, since it is smaller than the sum of its proper divisors (1382634600).

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

655181400 is a wasteful number, since it uses less digits than its factorization.

655181400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3649 (or 3640 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 30.

The square root of 655181400 is about 25596.5114810593. The cubic root of 655181400 is about 868.5347247075.

The spelling of 655181400 in words is "six hundred fifty-five million, one hundred eighty-one thousand, four hundred".