16247719261 has 4 divisors (see below), whose sum is σ = 17102862400. Its totient is φ = 15392576124.

The previous prime is 16247719259. The next prime is 16247719277. The reversal of 16247719261 is 16291774261.

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 16247719261 - 2¹ = 16247719259 is a prime.

It is a super-2 number, since 2×16247719261² (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 (16247719211) 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, 427571541 + ... + 427571578.

It is an arithmetic number, because the mean of its divisors is an integer number (4275715600).

Almost surely, 2^16247719261 is an apocalyptic number.

It is an amenable number.

16247719261 is a deficient number, since it is larger than the sum of its proper divisors (855143139).

16247719261 is an equidigital number, since it uses as much as digits as its factorization.

16247719261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855143138.

The product of its digits is 254016, while the sum is 46.

The spelling of 16247719261 in words is "sixteen billion, two hundred forty-seven million, seven hundred nineteen thousand, two hundred sixty-one".