16493858442 has 80 divisors (see below), whose sum is σ = 37633722984. Its totient is φ = 5397840000.

The previous prime is 16493858441. The next prime is 16493858443. The reversal of 16493858442 is 24485839461.

16493858442 is a `hidden beast` number, since 1 + 64 + 93 + 8 + 58 + 442 = 666.

It is an interprime number because it is at equal distance from previous prime (16493858441) and next prime (16493858443).

It can be written as a sum of positive squares in 4 ways, for example, as 6854349681 + 9639508761 = 82791^2 + 98181^2 .

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

It is not an unprimeable number, because it can be changed into a prime (16493858441) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6926092 + ... + 6928472.

Almost surely, 2^16493858442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16493858442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18816861492).

16493858442 is an abundant number, since it is smaller than the sum of its proper divisors (21139864542).

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

16493858442 is a wasteful number, since it uses less digits than its factorization.

16493858442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3157 (or 3148 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 54.

The spelling of 16493858442 in words is "sixteen billion, four hundred ninety-three million, eight hundred fifty-eight thousand, four hundred forty-two".