1864645941 has 16 divisors (see below), whose sum is σ = 2528930880. Its totient is φ = 1221907200.

The previous prime is 1864645933. The next prime is 1864645961. The reversal of 1864645941 is 1495464681.

It is not a de Polignac number, because 1864645941 - 2³ = 1864645933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1864645961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19981 + ... + 64253.

It is an arithmetic number, because the mean of its divisors is an integer number (158058180).

Almost surely, 2^1864645941 is an apocalyptic number.

It is an amenable number.

1864645941 is a deficient number, since it is larger than the sum of its proper divisors (664284939).

1864645941 is a wasteful number, since it uses less digits than its factorization.

1864645941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44516.

The product of its digits is 829440, while the sum is 48.

The square root of 1864645941 is about 43181.5463016321. The cubic root of 1864645941 is about 1230.8320413034.

The spelling of 1864645941 in words is "one billion, eight hundred sixty-four million, six hundred forty-five thousand, nine hundred forty-one".