3783573509881 has 27 divisors (see below), whose sum is σ = 4204426532943. Its totient is φ = 3402285025920.

The previous prime is 3783573509867. The next prime is 3783573509887. The reversal of 3783573509881 is 1889053753873.

The square root of 3783573509881 is 1945141.

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., 1698968868025 + 2084604641856 = 1303445^2 + 1443816^2 .

It is not a de Polignac number, because 3783573509881 - 2⁹ = 3783573509369 is a prime.

It is a super-2 number, since 2×3783573509881² (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 (3783573509887) 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, 2075464536 + ... + 2075466358.

Almost surely, 2^{3783573509881} is an apocalyptic number.

3783573509881 is the 1945141-st square number.

3783573509881 is the 972571-st centered octagonal number.

It is an amenable number.

3783573509881 is a deficient number, since it is larger than the sum of its proper divisors (420853023062).

3783573509881 is an frugal number, since it uses more digits than its factorization.

3783573509881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3862 (or 1931 counting only the distinct ones).

The product of its (nonzero) digits is 152409600, while the sum is 67.

The spelling of 3783573509881 in words is "three trillion, seven hundred eighty-three billion, five hundred seventy-three million, five hundred nine thousand, eight hundred eighty-one".