3971261416 has 8 divisors (see below), whose sum is σ = 7446115170. Its totient is φ = 1985630704.

The previous prime is 3971261377. The next prime is 3971261423. The reversal of 3971261416 is 6141621793.

It can be written as a sum of positive squares in only one way, i.e., 3074258916 + 897002500 = 55446^2 + 29950^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 248203831 + ... + 248203846.

Almost surely, 2^3971261416 is an apocalyptic number.

It is an amenable number.

3971261416 is a deficient number, since it is larger than the sum of its proper divisors (3474853754).

3971261416 is a wasteful number, since it uses less digits than its factorization.

3971261416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496407683 (or 496407679 counting only the distinct ones).

The product of its digits is 54432, while the sum is 40.

The square root of 3971261416 is about 63017.9451902393. The cubic root of 3971261416 is about 1583.5902727719.

The spelling of 3971261416 in words is "three billion, nine hundred seventy-one million, two hundred sixty-one thousand, four hundred sixteen".