16640763771 has 8 divisors (see below), whose sum is σ = 22282912080. Its totient is φ = 11046228992.

The previous prime is 16640763743. The next prime is 16640763779. The reversal of 16640763771 is 17736704661.

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

It is a cyclic number.

It is not a de Polignac number, because 16640763771 - 2²⁶ = 16573654907 is a prime.

It is a super-2 number, since 2×16640763771² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16640763771.

It is not an unprimeable number, because it can be changed into a prime (16640763779) 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, 11902566 + ... + 11903963.

It is an arithmetic number, because the mean of its divisors is an integer number (2785364010).

Almost surely, 2^16640763771 is an apocalyptic number.

16640763771 is a deficient number, since it is larger than the sum of its proper divisors (5642148309).

16640763771 is a wasteful number, since it uses less digits than its factorization.

16640763771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23806765.

The product of its (nonzero) digits is 889056, while the sum is 48.

The spelling of 16640763771 in words is "sixteen billion, six hundred forty million, seven hundred sixty-three thousand, seven hundred seventy-one".