1841152661 has 4 divisors (see below), whose sum is σ = 1841268000. Its totient is φ = 1841037324.

The previous prime is 1841152639. The next prime is 1841152669. The reversal of 1841152661 is 1662511481.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1662511481 = 17 ⋅97794793.

It is a cyclic number.

It is not a de Polignac number, because 1841152661 - 2¹⁸ = 1840890517 is a prime.

It is a super-2 number, since 2×1841152661² = 6779686242214761842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1841152669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28961 + ... + 67238.

It is an arithmetic number, because the mean of its divisors is an integer number (460317000).

Almost surely, 2^1841152661 is an apocalyptic number.

It is an amenable number.

1841152661 is a deficient number, since it is larger than the sum of its proper divisors (115339).

1841152661 is an equidigital number, since it uses as much as digits as its factorization.

1841152661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115338.

The product of its digits is 11520, while the sum is 35.

The square root of 1841152661 is about 42908.6548495755. The cubic root of 1841152661 is about 1225.6409609181.

The spelling of 1841152661 in words is "one billion, eight hundred forty-one million, one hundred fifty-two thousand, six hundred sixty-one".