16051977 has 6 divisors (see below), whose sum is σ = 23186202. Its totient is φ = 10701312.

The previous prime is 16051949. The next prime is 16051991. The reversal of 16051977 is 77915061.

It can be written as a sum of positive squares in only one way, i.e., 14930496 + 1121481 = 3864^2 + 1059^2 .

It is not a de Polignac number, because 16051977 - 2¹⁵ = 16019209 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16051577) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 891768 + ... + 891785.

It is an arithmetic number, because the mean of its divisors is an integer number (3864367).

Almost surely, 2^16051977 is an apocalyptic number.

It is an amenable number.

16051977 is a deficient number, since it is larger than the sum of its proper divisors (7134225).

16051977 is a wasteful number, since it uses less digits than its factorization.

16051977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1783559 (or 1783556 counting only the distinct ones).

The product of its (nonzero) digits is 13230, while the sum is 36.

The square root of 16051977 is about 4006.4918569741. The cubic root of 16051977 is about 252.2567771929.

The spelling of 16051977 in words is "sixteen million, fifty-one thousand, nine hundred seventy-seven".