618235086621 has 4 divisors (see below), whose sum is σ = 824313448832. Its totient is φ = 412156724412.

The previous prime is 618235086619. The next prime is 618235086629. The reversal of 618235086621 is 126680532816.

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 not a de Polignac number, because 618235086621 - 2¹ = 618235086619 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 (618235086629) 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, 103039181101 + ... + 103039181106.

It is an arithmetic number, because the mean of its divisors is an integer number (206078362208).

Almost surely, 2^618235086621 is an apocalyptic number.

It is an amenable number.

618235086621 is a deficient number, since it is larger than the sum of its proper divisors (206078362211).

618235086621 is a wasteful number, since it uses less digits than its factorization.

618235086621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206078362210.

The product of its (nonzero) digits is 829440, while the sum is 48.

The spelling of 618235086621 in words is "six hundred eighteen billion, two hundred thirty-five million, eighty-six thousand, six hundred twenty-one".