18277232551 has 2 divisors, whose sum is σ = 18277232552. Its totient is φ = 18277232550.

The previous prime is 18277232531. The next prime is 18277232587. The reversal of 18277232551 is 15523277281.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18277232551 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18277232498 and 18277232507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18277232521) 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 as a sum of consecutive naturals, namely, 9138616275 + 9138616276.

It is an arithmetic number, because the mean of its divisors is an integer number (9138616276).

Almost surely, 2^18277232551 is an apocalyptic number.

18277232551 is a deficient number, since it is larger than the sum of its proper divisors (1).

18277232551 is an equidigital number, since it uses as much as digits as its factorization.

18277232551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 235200, while the sum is 43.

The spelling of 18277232551 in words is "eighteen billion, two hundred seventy-seven million, two hundred thirty-two thousand, five hundred fifty-one".