3902169602881 has 9 divisors (see below), whose sum is σ = 4289185514019. Its totient is φ = 3547407157800.

The previous prime is 3902169602867. The next prime is 3902169602887. The reversal of 3902169602881 is 1882069612093.

The square root of 3902169602881 is 1975391.

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., 15672786481 + 3886496816400 = 125191^2 + 1971420^2 .

It is not a de Polignac number, because 3902169602881 - 2¹⁹ = 3902169078593 is a prime.

It is a super-2 number, since 2×3902169602881² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3902169602887) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 21639511 + ... + 21819091.

Almost surely, 2^{3902169602881} is an apocalyptic number.

3902169602881 is the 1975391-st square number.

3902169602881 is the 987696-th centered octagonal number.

It is an amenable number.

3902169602881 is a deficient number, since it is larger than the sum of its proper divisors (387015911138).

3902169602881 is an frugal number, since it uses more digits than its factorization.

3902169602881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359184 (or 179592 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 55.

The spelling of 3902169602881 in words is "three trillion, nine hundred two billion, one hundred sixty-nine million, six hundred two thousand, eight hundred eighty-one".