3661237481 has 6 divisors (see below), whose sum is σ = 4024335546. Its totient is φ = 3328397600.

The previous prime is 3661237469. The next prime is 3661237483. The reversal of 3661237481 is 1847321663.

3661237481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1858385881 + 1802851600 = 43109^2 + 42460^2 .

It is not a de Polignac number, because 3661237481 - 2¹⁸ = 3660975337 is a prime.

It is a super-2 number, since 2×3661237481² = 26809319784558450722, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3661237483) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15128960 + ... + 15129201.

It is an arithmetic number, because the mean of its divisors is an integer number (670722591).

Almost surely, 2^3661237481 is an apocalyptic number.

It is an amenable number.

3661237481 is a deficient number, since it is larger than the sum of its proper divisors (363098065).

3661237481 is a wasteful number, since it uses less digits than its factorization.

3661237481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30258183 (or 30258172 counting only the distinct ones).

The product of its digits is 145152, while the sum is 41.

The square root of 3661237481 is about 60508.1604496451. The cubic root of 3661237481 is about 1541.2602099626.

It can be divided in two parts, 3661 and 237481, that added together give a palindrome (241142).

The spelling of 3661237481 in words is "three billion, six hundred sixty-one million, two hundred thirty-seven thousand, four hundred eighty-one".