16377861 has 8 divisors (see below), whose sum is σ = 21862624. Its totient is φ = 10905840.

The previous prime is 16377859. The next prime is 16377877. The reversal of 16377861 is 16877361.

16377861 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16377861 - 2¹ = 16377859 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16377811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 390 + ... + 5736.

It is an arithmetic number, because the mean of its divisors is an integer number (2732828).

Almost surely, 2^16377861 is an apocalyptic number.

It is an amenable number.

16377861 is a deficient number, since it is larger than the sum of its proper divisors (5484763).

16377861 is a wasteful number, since it uses less digits than its factorization.

16377861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6371.

The product of its digits is 42336, while the sum is 39.

The square root of 16377861 is about 4046.9570049606. The cubic root of 16377861 is about 253.9524421676.

Subtracting 16377861 from its reverse (16877361), we obtain a triangular number (499500 = T₉₉₉).

The spelling of 16377861 in words is "sixteen million, three hundred seventy-seven thousand, eight hundred sixty-one".