3954020161 has 27 divisors (see below), whose sum is σ = 4987822563. Its totient is φ = 3123928080.

The previous prime is 3954020149. The next prime is 3954020171. The reversal of 3954020161 is 1610204593.

The square root of 3954020161 is 62881.

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

It can be written as a sum of positive squares in only one way, i.e., 584914225 + 3369105936 = 24185^2 + 58044^2 .

It is not a de Polignac number, because 3954020161 - 2⁹ = 3954019649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3954020131) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 5721826 + ... + 5722516.

It is an arithmetic number, because the mean of its divisors is an integer number (184734169).

Almost surely, 2^3954020161 is an apocalyptic number.

3954020161 is the 62881-st square number.

3954020161 is the 31441-st centered octagonal number.

It is an amenable number.

3954020161 is a deficient number, since it is larger than the sum of its proper divisors (1033802402).

3954020161 is an frugal number, since it uses more digits than its factorization.

3954020161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1422 (or 711 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The cubic root of 3954020161 is about 1581.2952260526.

The spelling of 3954020161 in words is "three billion, nine hundred fifty-four million, twenty thousand, one hundred sixty-one".