16387990545 has 16 divisors (see below), whose sum is σ = 26452829952. Its totient is φ = 8662913280.

The previous prime is 16387990519. The next prime is 16387990571. The reversal of 16387990545 is 54509978361.

It is an interprime number because it is at equal distance from previous prime (16387990519) and next prime (16387990571).

It is not a de Polignac number, because 16387990545 - 2¹⁰ = 16387989521 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4832521 + ... + 4835910.

It is an arithmetic number, because the mean of its divisors is an integer number (1653301872).

Almost surely, 2^16387990545 is an apocalyptic number.

16387990545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16387990545 is a deficient number, since it is larger than the sum of its proper divisors (10064839407).

16387990545 is a wasteful number, since it uses less digits than its factorization.

16387990545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9668552.

The product of its (nonzero) digits is 8164800, while the sum is 57.

The spelling of 16387990545 in words is "sixteen billion, three hundred eighty-seven million, nine hundred ninety thousand, five hundred forty-five".