3661988745 has 16 divisors (see below), whose sum is σ = 5893054272. Its totient is φ = 1941769920.

The previous prime is 3661988713. The next prime is 3661988761. The reversal of 3661988745 is 5478891663.

It is not a de Polignac number, because 3661988745 - 2⁵ = 3661988713 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 702991 + ... + 708180.

It is an arithmetic number, because the mean of its divisors is an integer number (368315892).

Almost surely, 2^3661988745 is an apocalyptic number.

It is an amenable number.

3661988745 is a deficient number, since it is larger than the sum of its proper divisors (2231065527).

3661988745 is a wasteful number, since it uses less digits than its factorization.

3661988745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1411352.

The product of its digits is 8709120, while the sum is 57.

The square root of 3661988745 is about 60514.3680872568. The cubic root of 3661988745 is about 1541.3656218739.

The spelling of 3661988745 in words is "three billion, six hundred sixty-one million, nine hundred eighty-eight thousand, seven hundred forty-five".