9918162541 has 4 divisors (see below), whose sum is σ = 11335042912. Its totient is φ = 8501282172.

The previous prime is 9918162533. The next prime is 9918162563. The reversal of 9918162541 is 1452618199.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1452618199 = 23 ⋅63157313.

It is a cyclic number.

It is not a de Polignac number, because 9918162541 - 2³ = 9918162533 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9918162491 and 9918162500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9918162571) 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, 708440175 + ... + 708440188.

It is an arithmetic number, because the mean of its divisors is an integer number (2833760728).

Almost surely, 2^9918162541 is an apocalyptic number.

It is an amenable number.

9918162541 is a deficient number, since it is larger than the sum of its proper divisors (1416880371).

9918162541 is a wasteful number, since it uses less digits than its factorization.

9918162541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1416880370.

The product of its digits is 155520, while the sum is 46.

The square root of 9918162541 is about 99589.9720905674. The cubic root of 9918162541 is about 2148.5414691140.

The spelling of 9918162541 in words is "nine billion, nine hundred eighteen million, one hundred sixty-two thousand, five hundred forty-one".