1918162541 has 4 divisors (see below), whose sum is σ = 1980038784. Its totient is φ = 1856286300.

The previous prime is 1918162529. The next prime is 1918162553. The reversal of 1918162541 is 1452618191.

It is a happy number.

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.

It is an interprime number because it is at equal distance from previous prime (1918162529) and next prime (1918162553).

It is a cyclic number.

It is not a de Polignac number, because 1918162541 - 2²² = 1913968237 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1918162495 and 1918162504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1918161541) 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 3 ways as a sum of consecutive naturals, for example, 30938075 + ... + 30938136.

It is an arithmetic number, because the mean of its divisors is an integer number (495009696).

Almost surely, 2^1918162541 is an apocalyptic number.

It is an amenable number.

1918162541 is a deficient number, since it is larger than the sum of its proper divisors (61876243).

1918162541 is an equidigital number, since it uses as much as digits as its factorization.

1918162541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61876242.

The product of its digits is 17280, while the sum is 38.

The square root of 1918162541 is about 43796.8325452880. The cubic root of 1918162541 is about 1242.4963888660.

The spelling of 1918162541 in words is "one billion, nine hundred eighteen million, one hundred sixty-two thousand, five hundred forty-one".