16780564 has 12 divisors (see below), whose sum is σ = 31093524. Its totient is φ = 7896704.

The previous prime is 16780541. The next prime is 16780567. The reversal of 16780564 is 46508761.

It can be written as a sum of positive squares in 2 ways, for example, as 13690000 + 3090564 = 3700^2 + 1758^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16780567) 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, 123319 + ... + 123454.

It is an arithmetic number, because the mean of its divisors is an integer number (2591127).

Almost surely, 2^16780564 is an apocalyptic number.

It is an amenable number.

16780564 is a deficient number, since it is larger than the sum of its proper divisors (14312960).

16780564 is a wasteful number, since it uses less digits than its factorization.

16780564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246794 (or 246792 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 16780564 is about 4096.4086710190. The cubic root of 16780564 is about 256.0170276760.

The spelling of 16780564 in words is "sixteen million, seven hundred eighty thousand, five hundred sixty-four".