918887971436 has 24 divisors (see below), whose sum is σ = 1678029216864. Its totient is φ = 439452478080.

The previous prime is 918887971433. The next prime is 918887971493. The reversal of 918887971436 is 634179788819.

It is a self number, because there is not a number n which added to its sum of digits gives 918887971436.

It is not an unprimeable number, because it can be changed into a prime (918887971433) 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, 2657936 + ... + 2983688.

It is an arithmetic number, because the mean of its divisors is an integer number (69917884036).

Almost surely, 2^918887971436 is an apocalyptic number.

It is an amenable number.

918887971436 is a deficient number, since it is larger than the sum of its proper divisors (759141245428).

918887971436 is a wasteful number, since it uses less digits than its factorization.

918887971436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356441 (or 356439 counting only the distinct ones).

The product of its digits is 146313216, while the sum is 71.

The spelling of 918887971436 in words is "nine hundred eighteen billion, eight hundred eighty-seven million, nine hundred seventy-one thousand, four hundred thirty-six".