18078852464641 has 4 divisors (see below), whose sum is σ = 18080105257984. Its totient is φ = 18077599671300.

The previous prime is 18078852464639. The next prime is 18078852464657. The reversal of 18078852464641 is 14646425887081.

It is a happy number.

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 18078852464641 - 2¹ = 18078852464639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18078852464741) 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, 626375025 + ... + 626403886.

It is an arithmetic number, because the mean of its divisors is an integer number (4520026314496).

Almost surely, 2^{18078852464641} is an apocalyptic number.

It is an amenable number.

18078852464641 is a deficient number, since it is larger than the sum of its proper divisors (1252793343).

18078852464641 is a wasteful number, since it uses less digits than its factorization.

18078852464641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1252793342.

The product of its (nonzero) digits is 82575360, while the sum is 64.

The spelling of 18078852464641 in words is "eighteen trillion, seventy-eight billion, eight hundred fifty-two million, four hundred sixty-four thousand, six hundred forty-one".