18867558613461 has 16 divisors (see below), whose sum is σ = 25178700585024. Its totient is φ = 12567395585024.

The previous prime is 18867558613451. The next prime is 18867558613469. The reversal of 18867558613461 is 16431685576881.

It is a cyclic number.

It is not a de Polignac number, because 18867558613461 - 2¹⁵ = 18867558580693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18867558613469) 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 15 ways as a sum of consecutive naturals, for example, 77729095 + ... + 77971451.

It is an arithmetic number, because the mean of its divisors is an integer number (1573668786564).

Almost surely, 2^{18867558613461} is an apocalyptic number.

It is an amenable number.

18867558613461 is a deficient number, since it is larger than the sum of its proper divisors (6311141971563).

18867558613461 is a wasteful number, since it uses less digits than its factorization.

18867558613461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264900.

The product of its digits is 232243200, while the sum is 69.

The spelling of 18867558613461 in words is "eighteen trillion, eight hundred sixty-seven billion, five hundred fifty-eight million, six hundred thirteen thousand, four hundred sixty-one".