57735561 has 16 divisors (see below), whose sum is σ = 83370560. Its totient is φ = 35328960.

The previous prime is 57735533. The next prime is 57735581. The reversal of 57735561 is 16553775.

It is a happy number.

It is not a de Polignac number, because 57735561 - 2¹⁸ = 57473417 is a prime.

It is a super-4 number, since 4×57735561⁴ (a number of 32 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (57735581) 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, 2970 + ... + 11148.

It is an arithmetic number, because the mean of its divisors is an integer number (5210660).

Almost surely, 2^57735561 is an apocalyptic number.

It is an amenable number.

57735561 is a deficient number, since it is larger than the sum of its proper divisors (25634999).

57735561 is a wasteful number, since it uses less digits than its factorization.

57735561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8376.

The product of its digits is 110250, while the sum is 39.

The square root of 57735561 is about 7598.3920009434. The cubic root of 57735561 is about 386.4984857022.

The spelling of 57735561 in words is "fifty-seven million, seven hundred thirty-five thousand, five hundred sixty-one".