3896245679881 has 9 divisors (see below), whose sum is σ = 4112143748391. Its totient is φ = 3691144587744.

The previous prime is 3896245679867. The next prime is 3896245679923. The reversal of 3896245679881 is 1889765426983.

The square root of 3896245679881 is 1973891.

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., 2659968545481 + 1236277134400 = 1630941^2 + 1111880^2 .

It is not a de Polignac number, because 3896245679881 - 2⁵ = 3896245679849 is a prime.

It is a super-2 number, since 2×3896245679881² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3896245679798 and 3896245679807.

It is not an unprimeable number, because it can be changed into a prime (3896245679581) 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, 37451985 + ... + 37555873.

Almost surely, 2^{3896245679881} is an apocalyptic number.

3896245679881 is the 1973891-st square number.

3896245679881 is the 986946-th centered octagonal number.

It is an amenable number.

3896245679881 is a deficient number, since it is larger than the sum of its proper divisors (215898068510).

3896245679881 is an frugal number, since it uses more digits than its factorization.

3896245679881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207816 (or 103908 counting only the distinct ones).

The product of its digits is 1254113280, while the sum is 76.

The spelling of 3896245679881 in words is "three trillion, eight hundred ninety-six billion, two hundred forty-five million, six hundred seventy-nine thousand, eight hundred eighty-one".