16540477 has 4 divisors (see below), whose sum is σ = 16549056. Its totient is φ = 16531900.

The previous prime is 16540471. The next prime is 16540481. The reversal of 16540477 is 77404561.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 77404561 = 13 ⋅5954197.

It is a cyclic number.

It is not a de Polignac number, because 16540477 - 2¹¹ = 16538429 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 (16540471) 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, 102 + ... + 5752.

It is an arithmetic number, because the mean of its divisors is an integer number (4137264).

Almost surely, 2^16540477 is an apocalyptic number.

It is an amenable number.

16540477 is a deficient number, since it is larger than the sum of its proper divisors (8579).

16540477 is an equidigital number, since it uses as much as digits as its factorization.

16540477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8578.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 16540477 is about 4066.9985247108. The cubic root of 16540477 is about 254.7901746961.

The spelling of 16540477 in words is "sixteen million, five hundred forty thousand, four hundred seventy-seven".