618409436 has 6 divisors (see below), whose sum is σ = 1082216520. Its totient is φ = 309204716.

The previous prime is 618409423. The next prime is 618409439. The reversal of 618409436 is 634904816.

It is a junction number, because it is equal to n+sod(n) for n = 618409393 and 618409402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618409439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77301176 + ... + 77301183.

It is an arithmetic number, because the mean of its divisors is an integer number (180369420).

Almost surely, 2^618409436 is an apocalyptic number.

It is an amenable number.

618409436 is a deficient number, since it is larger than the sum of its proper divisors (463807084).

618409436 is a wasteful number, since it uses less digits than its factorization.

618409436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154602363 (or 154602361 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 618409436 is about 24867.8393914711. The cubic root of 618409436 is about 851.9720927328.

The spelling of 618409436 in words is "six hundred eighteen million, four hundred nine thousand, four hundred thirty-six".