1618745958 has 56 divisors (see below), whose sum is σ = 3649212216. Its totient is φ = 538293600.

The previous prime is 1618745951. The next prime is 1618745963. The reversal of 1618745958 is 8595478161.

It is a happy number.

1618745958 is a `hidden beast` number, since 1 + 6 + 187 + 459 + 5 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1618745951) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 758553 + ... + 760683.

Almost surely, 2^1618745958 is an apocalyptic number.

1618745958 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1618745958, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1824606108).

1618745958 is an abundant number, since it is smaller than the sum of its proper divisors (2030466258).

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

1618745958 is an equidigital number, since it uses as much as digits as its factorization.

1618745958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2672 (or 2657 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 54.

The square root of 1618745958 is about 40233.6421170145. The cubic root of 1618745958 is about 1174.1571642159.

The spelling of 1618745958 in words is "one billion, six hundred eighteen million, seven hundred forty-five thousand, nine hundred fifty-eight".