3961663725 has 24 divisors (see below), whose sum is σ = 6568240320. Its totient is φ = 2106987520.

The previous prime is 3961663711. The next prime is 3961663729. The reversal of 3961663725 is 5273661693.

It is not a de Polignac number, because 3961663725 - 2⁴ = 3961663709 is a prime.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3961663729) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46644 + ... + 100493.

It is an arithmetic number, because the mean of its divisors is an integer number (273676680).

Almost surely, 2^3961663725 is an apocalyptic number.

It is an amenable number.

3961663725 is a deficient number, since it is larger than the sum of its proper divisors (2606576595).

3961663725 is a wasteful number, since it uses less digits than its factorization.

3961663725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147509 (or 147504 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 48.

The square root of 3961663725 is about 62941.7486649362. The cubic root of 3961663725 is about 1582.3135104644.

The spelling of 3961663725 in words is "three billion, nine hundred sixty-one million, six hundred sixty-three thousand, seven hundred twenty-five".