618248491 has 16 divisors (see below), whose sum is σ = 718308864. Its totient is φ = 521181504.

The previous prime is 618248447. The next prime is 618248507. The reversal of 618248491 is 194842816.

It is a cyclic number.

It is not a de Polignac number, because 618248491 - 2⁷ = 618248363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (618248431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133090 + ... + 137656.

It is an arithmetic number, because the mean of its divisors is an integer number (44894304).

Almost surely, 2^618248491 is an apocalyptic number.

618248491 is a deficient number, since it is larger than the sum of its proper divisors (100060373).

618248491 is a wasteful number, since it uses less digits than its factorization.

618248491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4890.

The product of its digits is 110592, while the sum is 43.

The square root of 618248491 is about 24864.6031739901. The cubic root of 618248491 is about 851.8981759296.

The spelling of 618248491 in words is "six hundred eighteen million, two hundred forty-eight thousand, four hundred ninety-one".