4068015961 has 3 divisors (see below), whose sum is σ = 4068079743. Its totient is φ = 4067952180.

The previous prime is 4068015943. The next prime is 4068015971. The reversal of 4068015961 is 1695108604.

The square root of 4068015961 is 63781.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 2091324361 + 1976691600 = 45731^2 + 44460^2 .

It is not a de Polignac number, because 4068015961 - 2¹⁷ = 4067884889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4068015971) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 31891 + ... + 95671.

It is an arithmetic number, because the mean of its divisors is an integer number (1356026581).

Almost surely, 2^4068015961 is an apocalyptic number.

4068015961 is the 63781-st square number.

4068015961 is the 31891-st centered octagonal number.

It is an amenable number.

4068015961 is a deficient number, since it is larger than the sum of its proper divisors (63782).

4068015961 is an frugal number, since it uses more digits than its factorization.

4068015961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127562 (or 63781 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The cubic root of 4068015961 is about 1596.3479151872.

The spelling of 4068015961 in words is "four billion, sixty-eight million, fifteen thousand, nine hundred sixty-one".