3961663745 has 64 divisors (see below), whose sum is σ = 5424427008. Its totient is φ = 2757888000.

The previous prime is 3961663733. The next prime is 3961663753. The reversal of 3961663745 is 5473661693.

It is not a de Polignac number, because 3961663745 - 2⁴ = 3961663729 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3961663693 and 3961663702.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 20741600 + ... + 20741790.

It is an arithmetic number, because the mean of its divisors is an integer number (84756672).

Almost surely, 2^3961663745 is an apocalyptic number.

It is an amenable number.

3961663745 is a deficient number, since it is larger than the sum of its proper divisors (1462763263).

3961663745 is a wasteful number, since it uses less digits than its factorization.

3961663745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474.

The product of its digits is 2449440, while the sum is 50.

The square root of 3961663745 is about 62941.7488238133. The cubic root of 3961663745 is about 1582.3135131271.

The spelling of 3961663745 in words is "three billion, nine hundred sixty-one million, six hundred sixty-three thousand, seven hundred forty-five".