1018478745956 has 96 divisors (see below), whose sum is σ = 2270935296000. Its totient is φ = 389083046400.

The previous prime is 1018478745901. The next prime is 1018478745959. The reversal of 1018478745956 is 6595478748101.

It is a junction number, because it is equal to n+sod(n) for n = 1018478745892 and 1018478745901.

It is not an unprimeable number, because it can be changed into a prime (1018478745959) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36623345 + ... + 36651143.

It is an arithmetic number, because the mean of its divisors is an integer number (23655576000).

Almost surely, 2^{1018478745956} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1018478745956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1135467648000).

1018478745956 is an abundant number, since it is smaller than the sum of its proper divisors (1252456550044).

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

1018478745956 is a wasteful number, since it uses less digits than its factorization.

1018478745956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31897 (or 31895 counting only the distinct ones).

The product of its (nonzero) digits is 67737600, while the sum is 65.

The spelling of 1018478745956 in words is "one trillion, eighteen billion, four hundred seventy-eight million, seven hundred forty-five thousand, nine hundred fifty-six".