38161231801 has 81 divisors (see below), whose sum is σ = 50816299653. Its totient is φ = 28552209840.

The previous prime is 38161231789. The next prime is 38161231807. The reversal of 38161231801 is 10813216183.

It is a happy number.

The square root of 38161231801 is 195349.

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

It is not a de Polignac number, because 38161231801 - 2⁷ = 38161231673 is a prime.

It is a super-2 number, since 2×38161231801² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (38161231807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 646800510 + ... + 646800568.

Almost surely, 2^38161231801 is an apocalyptic number.

38161231801 is the 195349-th square number.

38161231801 is the 97675-th centered octagonal number.

It is an amenable number.

38161231801 is a deficient number, since it is larger than the sum of its proper divisors (12655067852).

38161231801 is an equidigital number, since it uses as much as digits as its factorization.

38161231801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240 (or 120 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

Adding to 38161231801 its reverse (10813216183), we get a palindrome (48974447984).

It can be divided in two parts, 38161 and 231801, that added together give a palindrome (269962).

The spelling of 38161231801 in words is "thirty-eight billion, one hundred sixty-one million, two hundred thirty-one thousand, eight hundred one".