3735420561 has 12 divisors (see below), whose sum is σ = 5460615888. Its totient is φ = 2460276504.

The previous prime is 3735420529. The next prime is 3735420599. The reversal of 3735420561 is 1650245373.

3735420561 is a `hidden beast` number, since 3 + 73 + 5 + 4 + 20 + 561 = 666.

It is not a de Polignac number, because 3735420561 - 2⁵ = 3735420529 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3735420511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2499535 + ... + 2501028.

It is an arithmetic number, because the mean of its divisors is an integer number (455051324).

Almost surely, 2^3735420561 is an apocalyptic number.

It is an amenable number.

3735420561 is a deficient number, since it is larger than the sum of its proper divisors (1725195327).

3735420561 is a wasteful number, since it uses less digits than its factorization.

3735420561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5000652 (or 5000649 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 36.

The square root of 3735420561 is about 61118.0870201285. The cubic root of 3735420561 is about 1551.6002288584.

The spelling of 3735420561 in words is "three billion, seven hundred thirty-five million, four hundred twenty thousand, five hundred sixty-one".