618103643 has 4 divisors (see below), whose sum is σ = 618451320. Its totient is φ = 617755968.

The previous prime is 618103639. The next prime is 618103657. The reversal of 618103643 is 346301816.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 618103643 - 2² = 618103639 is a prime.

It is a super-2 number, since 2×618103643² = 764104226979742898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (618103613) 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, 171158 + ... + 174731.

It is an arithmetic number, because the mean of its divisors is an integer number (154612830).

Almost surely, 2^618103643 is an apocalyptic number.

618103643 is a deficient number, since it is larger than the sum of its proper divisors (347677).

618103643 is a wasteful number, since it uses less digits than its factorization.

618103643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347676.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 618103643 is about 24861.6902683627. The cubic root of 618103643 is about 851.8316409863.

The spelling of 618103643 in words is "six hundred eighteen million, one hundred three thousand, six hundred forty-three".