16640414261 has 4 divisors (see below), whose sum is σ = 16646430912. Its totient is φ = 16634397612.

The previous prime is 16640414251. The next prime is 16640414303. The reversal of 16640414261 is 16241404661.

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 a de Polignac number, because none of the positive numbers 2^k-16640414261 is a prime.

It is a super-2 number, since 2×16640414261² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16640414251) 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, 3004175 + ... + 3009708.

It is an arithmetic number, because the mean of its divisors is an integer number (4161607728).

Almost surely, 2^16640414261 is an apocalyptic number.

It is an amenable number.

16640414261 is a deficient number, since it is larger than the sum of its proper divisors (6016651).

16640414261 is an equidigital number, since it uses as much as digits as its factorization.

16640414261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6016650.

The product of its (nonzero) digits is 27648, while the sum is 35.

The spelling of 16640414261 in words is "sixteen billion, six hundred forty million, four hundred fourteen thousand, two hundred sixty-one".