16640476501 has 4 divisors (see below), whose sum is σ = 18153247104. Its totient is φ = 15127705900.

The previous prime is 16640476483. The next prime is 16640476513. The reversal of 16640476501 is 10567404661.

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.

It is a cyclic number.

It is not a de Polignac number, because 16640476501 - 2⁹ = 16640475989 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16640476201) 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, 756385285 + ... + 756385306.

It is an arithmetic number, because the mean of its divisors is an integer number (4538311776).

Almost surely, 2^16640476501 is an apocalyptic number.

16640476501 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16640476501 is a deficient number, since it is larger than the sum of its proper divisors (1512770603).

16640476501 is a wasteful number, since it uses less digits than its factorization.

16640476501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1512770602.

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 16640476501 in words is "sixteen billion, six hundred forty million, four hundred seventy-six thousand, five hundred one".