18461354677 has 4 divisors (see below), whose sum is σ = 18583615456. Its totient is φ = 18339093900.

The previous prime is 18461354671. The next prime is 18461354711. The reversal of 18461354677 is 77645316481.

It is a happy number.

18461354677 is nontrivially palindromic in base 15.

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, and also an emirpimes, since its reverse is a distinct semiprime: 77645316481 = 148891 ⋅521491.

It is a cyclic number.

It is not a de Polignac number, because 18461354677 - 2¹⁵ = 18461321909 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 (18461354671) 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 3 ways as a sum of consecutive naturals, for example, 61130163 + ... + 61130464.

It is an arithmetic number, because the mean of its divisors is an integer number (4645903864).

Almost surely, 2^18461354677 is an apocalyptic number.

It is an amenable number.

18461354677 is a deficient number, since it is larger than the sum of its proper divisors (122260779).

18461354677 is a wasteful number, since it uses less digits than its factorization.

18461354677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122260778.

The product of its digits is 3386880, while the sum is 52.

The spelling of 18461354677 in words is "eighteen billion, four hundred sixty-one million, three hundred fifty-four thousand, six hundred seventy-seven".