18049971461 has 8 divisors (see below), whose sum is σ = 18686976480. Its totient is φ = 17413939312.

The previous prime is 18049971451. The next prime is 18049971463. The reversal of 18049971461 is 16417994081.

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 18049971461 - 2⁶ = 18049971397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18049971463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 205355 + ... + 279768.

It is an arithmetic number, because the mean of its divisors is an integer number (2335872060).

Almost surely, 2^18049971461 is an apocalyptic number.

It is an amenable number.

18049971461 is a deficient number, since it is larger than the sum of its proper divisors (637005019).

18049971461 is a wasteful number, since it uses less digits than its factorization.

18049971461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486435.

The product of its (nonzero) digits is 435456, while the sum is 50.

The spelling of 18049971461 in words is "eighteen billion, forty-nine million, nine hundred seventy-one thousand, four hundred sixty-one".