1842380661 has 32 divisors (see below), whose sum is σ = 2960851968. Its totient is φ = 1005213440.

The previous prime is 1842380651. The next prime is 1842380711. The reversal of 1842380661 is 1660832481.

It is not a de Polignac number, because 1842380661 - 2⁹ = 1842380149 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1842380611) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58491 + ... + 84296.

It is an arithmetic number, because the mean of its divisors is an integer number (92526624).

Almost surely, 2^1842380661 is an apocalyptic number.

1842380661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1842380661 is a deficient number, since it is larger than the sum of its proper divisors (1118471307).

1842380661 is a wasteful number, since it uses less digits than its factorization.

1842380661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142841.

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 1842380661 is about 42922.9619318145. The cubic root of 1842380661 is about 1225.9133903655.

The spelling of 1842380661 in words is "one billion, eight hundred forty-two million, three hundred eighty thousand, six hundred sixty-one".