1864236541 has 4 divisors (see below), whose sum is σ = 1973897532. Its totient is φ = 1754575552.

The previous prime is 1864236499. The next prime is 1864236557. The reversal of 1864236541 is 1456324681.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 841580100 + 1022656441 = 29010^2 + 31979^2 .

It is a cyclic number.

It is not a de Polignac number, because 1864236541 - 2¹⁷ = 1864105469 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1864236494 and 1864236503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1864236571) 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, 54830470 + ... + 54830503.

It is an arithmetic number, because the mean of its divisors is an integer number (493474383).

Almost surely, 2^1864236541 is an apocalyptic number.

It is an amenable number.

1864236541 is a deficient number, since it is larger than the sum of its proper divisors (109660991).

1864236541 is a wasteful number, since it uses less digits than its factorization.

1864236541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109660990.

The product of its digits is 138240, while the sum is 40.

The square root of 1864236541 is about 43176.8055905019. The cubic root of 1864236541 is about 1230.7419545815.

The spelling of 1864236541 in words is "one billion, eight hundred sixty-four million, two hundred thirty-six thousand, five hundred forty-one".