56605554 has 40 divisors (see below), whose sum is σ = 128472960. Its totient is φ = 18625464.

The previous prime is 56605519. The next prime is 56605559. The reversal of 56605554 is 45550665.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (56605559) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10587 + ... + 15009.

It is an arithmetic number, because the mean of its divisors is an integer number (3211824).

Almost surely, 2^56605554 is an apocalyptic number.

56605554 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 56605554, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64236480).

56605554 is an abundant number, since it is smaller than the sum of its proper divisors (71867406).

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

56605554 is a wasteful number, since it uses less digits than its factorization.

56605554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4516 (or 4507 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

The square root of 56605554 is about 7523.6662605408. Note that the first 3 decimals coincide. The cubic root of 56605554 is about 383.9603230489.

The spelling of 56605554 in words is "fifty-six million, six hundred five thousand, five hundred fifty-four".