13551265364381 has 2 divisors, whose sum is σ = 13551265364382. Its totient is φ = 13551265364380.

The previous prime is 13551265364353. The next prime is 13551265364411. The reversal of 13551265364381 is 18346356215531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7234437675481 + 6316827688900 = 2689691^2 + 2513330^2 .

It is a cyclic number.

It is not a de Polignac number, because 13551265364381 - 2⁶ = 13551265364317 is a prime.

It is a super-2 number, since 2×13551265364381² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13551265324381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6775632682190 + 6775632682191.

It is an arithmetic number, because the mean of its divisors is an integer number (6775632682191).

Almost surely, 2^{13551265364381} is an apocalyptic number.

It is an amenable number.

13551265364381 is a deficient number, since it is larger than the sum of its proper divisors (1).

13551265364381 is an equidigital number, since it uses as much as digits as its factorization.

13551265364381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776000, while the sum is 53.

The spelling of 13551265364381 in words is "thirteen trillion, five hundred fifty-one billion, two hundred sixty-five million, three hundred sixty-four thousand, three hundred eighty-one".