554640640 has 144 divisors (see below), whose sum is σ = 1430472960. Its totient is φ = 205291520.

The previous prime is 554640587. The next prime is 554640643. The reversal of 554640640 is 46046455.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 554640596 and 554640605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (554640643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1544781 + ... + 1545139.

It is an arithmetic number, because the mean of its divisors is an integer number (9933840).

Almost surely, 2^554640640 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 554640640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (715236480).

554640640 is an abundant number, since it is smaller than the sum of its proper divisors (875832320).

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

554640640 is a wasteful number, since it uses less digits than its factorization.

554640640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468 (or 454 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 34.

The square root of 554640640 is about 23550.8097525329. The cubic root of 554640640 is about 821.6191683314.

The spelling of 554640640 in words is "five hundred fifty-four million, six hundred forty thousand, six hundred forty".