618818421 has 8 divisors (see below), whose sum is σ = 888559840. Its totient is φ = 380811312.

The previous prime is 618818419. The next prime is 618818441. The reversal of 618818421 is 124818816.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 618818421 - 2¹ = 618818419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 15867139 = 618818421 / (6 + 1 + 8 + 8 + 1 + 8 + 4 + 2 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 618818421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618818441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7933531 + ... + 7933608.

It is an arithmetic number, because the mean of its divisors is an integer number (111069980).

Almost surely, 2^618818421 is an apocalyptic number.

It is an amenable number.

618818421 is a deficient number, since it is larger than the sum of its proper divisors (269741419).

618818421 is a wasteful number, since it uses less digits than its factorization.

618818421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15867155.

The product of its digits is 24576, while the sum is 39.

The square root of 618818421 is about 24876.0612034944. The cubic root of 618818421 is about 852.1598685546.

The spelling of 618818421 in words is "six hundred eighteen million, eight hundred eighteen thousand, four hundred twenty-one".