655617480 has 128 divisors (see below), whose sum is σ = 2253312000. Its totient is φ = 149490432.

The previous prime is 655617463. The next prime is 655617503. The reversal of 655617480 is 84716556.

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, 502509 + ... + 503811.

It is an arithmetic number, because the mean of its divisors is an integer number (17604000).

Almost surely, 2^655617480 is an apocalyptic number.

655617480 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 655617480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1126656000).

655617480 is an abundant number, since it is smaller than the sum of its proper divisors (1597694520).

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

655617480 is a wasteful number, since it uses less digits than its factorization.

655617480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1923 (or 1919 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 42.

The square root of 655617480 is about 25605.0284124037. The cubic root of 655617480 is about 868.7273770138.

The spelling of 655617480 in words is "six hundred fifty-five million, six hundred seventeen thousand, four hundred eighty".