16361493444 has 36 divisors (see below), whose sum is σ = 42036228780. Its totient is φ = 5364423360.

The previous prime is 16361493437. The next prime is 16361493457. The reversal of 16361493444 is 44439416361.

16361493444 is a `hidden beast` number, since 1 + 63 + 6 + 149 + 3 + 444 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 8716089600 + 7645403844 = 93360^2 + 87438^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×16361493444² (a number of 21 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 16361493444.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3723099 + ... + 3727490.

Almost surely, 2^16361493444 is an apocalyptic number.

It is an amenable number.

16361493444 is an abundant number, since it is smaller than the sum of its proper divisors (25674735336).

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

16361493444 is a wasteful number, since it uses less digits than its factorization.

16361493444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7450660 (or 7450655 counting only the distinct ones).

The product of its digits is 746496, while the sum is 45.

The spelling of 16361493444 in words is "sixteen billion, three hundred sixty-one million, four hundred ninety-three thousand, four hundred forty-four".