16420002461 has 4 divisors (see below), whose sum is σ = 16420524252. Its totient is φ = 16419480672.

The previous prime is 16420002439. The next prime is 16420002499.

16420002461 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5519598436 + 10900404025 = 74294^2 + 104405^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16420002461 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16420002461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16420002061) 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, 210440 + ... + 277713.

It is an arithmetic number, because the mean of its divisors is an integer number (4105131063).

Almost surely, 2^16420002461 is an apocalyptic number.

It is an amenable number.

16420002461 is a deficient number, since it is larger than the sum of its proper divisors (521791).

16420002461 is an equidigital number, since it uses as much as digits as its factorization.

16420002461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521790.

The product of its (nonzero) digits is 2304, while the sum is 26.

It can be divided in two parts, 1642000 and 2461, that added together give a palindrome (1644461).

The spelling of 16420002461 in words is "sixteen billion, four hundred twenty million, two thousand, four hundred sixty-one".