16345663536 has 20 divisors (see below), whose sum is σ = 42226297592. Its totient is φ = 5448554496.

The previous prime is 16345663531. The next prime is 16345663541. The reversal of 16345663536 is 63536654361.

It is an interprime number because it is at equal distance from previous prime (16345663531) and next prime (16345663541).

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 340534657 = 16345663536 / (1 + 6 + 3 + 4 + 5 + 6 + 6 + 3 + 5 + 3 + 6).

It is not an unprimeable number, because it can be changed into a prime (16345663531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170267281 + ... + 170267376.

Almost surely, 2^16345663536 is an apocalyptic number.

16345663536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16345663536 is an abundant number, since it is smaller than the sum of its proper divisors (25880634056).

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

16345663536 is a wasteful number, since it uses less digits than its factorization.

16345663536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340534668 (or 340534662 counting only the distinct ones).

The product of its digits is 3499200, while the sum is 48.

The spelling of 16345663536 in words is "sixteen billion, three hundred forty-five million, six hundred sixty-three thousand, five hundred thirty-six".