2017902639841 has 27 divisors (see below), whose sum is σ = 2244773917939. Its totient is φ = 1812595004000.

The previous prime is 2017902639829. The next prime is 2017902639859. The reversal of 2017902639841 is 1489362097102.

The square root of 2017902639841 is 1420529.

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., 387480105441 + 1630422534400 = 622479^2 + 1276880^2 .

It is not a de Polignac number, because 2017902639841 - 2¹⁵ = 2017902607073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2017902639541) 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, 1390697166 + ... + 1390698616.

Almost surely, 2^{2017902639841} is an apocalyptic number.

2017902639841 is the 1420529-th square number.

2017902639841 is the 710265-th centered octagonal number.

It is an amenable number.

2017902639841 is a deficient number, since it is larger than the sum of its proper divisors (226871278098).

2017902639841 is an frugal number, since it uses more digits than its factorization.

2017902639841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3102 (or 1551 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 52.

The spelling of 2017902639841 in words is "two trillion, seventeen billion, nine hundred two million, six hundred thirty-nine thousand, eight hundred forty-one".