618215445 has 48 divisors (see below), whose sum is σ = 1139299200. Its totient is φ = 309225600.

The previous prime is 618215431. The next prime is 618215461. The reversal of 618215445 is 544512816.

It is a happy number.

It is not a de Polignac number, because 618215445 - 2⁸ = 618215189 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 82776 + ... + 89934.

It is an arithmetic number, because the mean of its divisors is an integer number (23735400).

Almost surely, 2^618215445 is an apocalyptic number.

It is an amenable number.

618215445 is a deficient number, since it is larger than the sum of its proper divisors (521083755).

618215445 is a wasteful number, since it uses less digits than its factorization.

618215445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7290 (or 7287 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 618215445 is about 24863.9386461598. The cubic root of 618215445 is about 851.8829973894.

The spelling of 618215445 in words is "six hundred eighteen million, two hundred fifteen thousand, four hundred forty-five".