618845477 has 4 divisors (see below), whose sum is σ = 618995040. Its totient is φ = 618695916.

The previous prime is 618845453. The next prime is 618845497. The reversal of 618845477 is 774548816.

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 a cyclic number.

It is not a de Polignac number, because 618845477 - 2¹⁴ = 618829093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618845497) 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, 68393 + ... + 76910.

It is an arithmetic number, because the mean of its divisors is an integer number (154748760).

Almost surely, 2^618845477 is an apocalyptic number.

It is an amenable number.

618845477 is a deficient number, since it is larger than the sum of its proper divisors (149563).

618845477 is a wasteful number, since it uses less digits than its factorization.

618845477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149562.

The product of its digits is 1505280, while the sum is 50.

The square root of 618845477 is about 24876.6050135464. The cubic root of 618845477 is about 852.1722877612.

The spelling of 618845477 in words is "six hundred eighteen million, eight hundred forty-five thousand, four hundred seventy-seven".