918216250644 has 96 divisors (see below), whose sum is σ = 2725688448000. Its totient is φ = 238497715680.

The previous prime is 918216250631. The next prime is 918216250649. The reversal of 918216250644 is 446052612819.

It is a junction number, because it is equal to n+sod(n) for n = 918216250593 and 918216250602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (918216250649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10094934 + ... + 10185485.

It is an arithmetic number, because the mean of its divisors is an integer number (28392588000).

Almost surely, 2^918216250644 is an apocalyptic number.

It is an amenable number.

918216250644 is an abundant number, since it is smaller than the sum of its proper divisors (1807472197356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

918216250644 is a wasteful number, since it uses less digits than its factorization.

918216250644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20280458 (or 20280442 counting only the distinct ones).

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

The spelling of 918216250644 in words is "nine hundred eighteen billion, two hundred sixteen million, two hundred fifty thousand, six hundred forty-four".