16401500387 has 4 divisors (see below), whose sum is σ = 16402030080. Its totient is φ = 16400970696.

The previous prime is 16401500327. The next prime is 16401500411. The reversal of 16401500387 is 78300510461.

16401500387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78300510461 = 71 ⋅1102824091.

It is a cyclic number.

It is not a de Polignac number, because 16401500387 - 2¹² = 16401496291 is a prime.

It is a super-2 number, since 2×16401500387² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16401500317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215312 + ... + 281357.

It is an arithmetic number, because the mean of its divisors is an integer number (4100507520).

Almost surely, 2^16401500387 is an apocalyptic number.

16401500387 is a deficient number, since it is larger than the sum of its proper divisors (529693).

16401500387 is an equidigital number, since it uses as much as digits as its factorization.

16401500387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529692.

The product of its (nonzero) digits is 20160, while the sum is 35.

The spelling of 16401500387 in words is "sixteen billion, four hundred one million, five hundred thousand, three hundred eighty-seven".