57661550 has 24 divisors (see below), whose sum is σ = 110713152. Its totient is φ = 22320000.

The previous prime is 57661543. The next prime is 57661559. The reversal of 57661550 is 5516675.

It is a self number, because there is not a number n which added to its sum of digits gives 57661550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57661559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17051 + ... + 20150.

It is an arithmetic number, because the mean of its divisors is an integer number (4613048).

Almost surely, 2^57661550 is an apocalyptic number.

57661550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

57661550 is a deficient number, since it is larger than the sum of its proper divisors (53051602).

57661550 is a wasteful number, since it uses less digits than its factorization.

57661550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37244 (or 37239 counting only the distinct ones).

The product of its (nonzero) digits is 31500, while the sum is 35.

The square root of 57661550 is about 7593.5202640146. The cubic root of 57661550 is about 386.3332647616. Note that the first 3 decimals are identical.

It can be divided in two parts, 576 and 61550, that added together give a palindrome (62126).

The spelling of 57661550 in words is "fifty-seven million, six hundred sixty-one thousand, five hundred fifty".