3645660042 has 32 divisors (see below), whose sum is σ = 8133773760. Its totient is φ = 1210374000.

The previous prime is 3645660019. The next prime is 3645660049. The reversal of 3645660042 is 2400665463.

3645660042 is a `hidden beast` number, since 3 + 6 + 4 + 5 + 6 + 600 + 42 = 666.

3645660042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 3645659979 and 3645660006.

It is not an unprimeable number, because it can be changed into a prime (3645660049) 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, 120933 + ... + 148040.

It is an arithmetic number, because the mean of its divisors is an integer number (254180430).

Almost surely, 2^3645660042 is an apocalyptic number.

3645660042 is an abundant number, since it is smaller than the sum of its proper divisors (4488113718).

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

3645660042 is a wasteful number, since it uses less digits than its factorization.

3645660042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269235 (or 269229 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

The square root of 3645660042 is about 60379.3014368335. The cubic root of 3645660042 is about 1539.0712398958.

The spelling of 3645660042 in words is "three billion, six hundred forty-five million, six hundred sixty thousand, forty-two".