3922642161 has 15 divisors (see below), whose sum is σ = 5860591561. Its totient is φ = 2614718988.

The previous prime is 3922642121. The next prime is 3922642183. The reversal of 3922642161 is 1612462293.

It is a happy number.

The square root of 3922642161 is 62631.

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

3922642161 is a `hidden beast` number, since 3 + 9 + 2 + 2 + 642 + 1 + 6 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-3922642161 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3922642121) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 560200 + ... + 567158.

Almost surely, 2^3922642161 is an apocalyptic number.

3922642161 is the 62631-st square number.

3922642161 is the 31316-th centered octagonal number.

It is an amenable number.

3922642161 is a deficient number, since it is larger than the sum of its proper divisors (1937949400).

3922642161 is an frugal number, since it uses more digits than its factorization.

3922642161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13930 (or 6962 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The cubic root of 3922642161 is about 1577.1012064197.

Multiplying 3922642161 by its sum of digits (36), we get a square (141215117796 = 375786²).

The spelling of 3922642161 in words is "three billion, nine hundred twenty-two million, six hundred forty-two thousand, one hundred sixty-one".