155335727752649 has 2 divisors, whose sum is σ = 155335727752650. Its totient is φ = 155335727752648.

The previous prime is 155335727752643. The next prime is 155335727752693. The reversal of 155335727752649 is 946257727533551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 152842903591225 + 2492824161424 = 12362965^2 + 1578868^2 .

It is a cyclic number.

It is not a de Polignac number, because 155335727752649 - 2²⁸ = 155335459317193 is a prime.

It is not a weakly prime, because it can be changed into another prime (155335727752643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77667863876324 + 77667863876325.

It is an arithmetic number, because the mean of its divisors is an integer number (77667863876325).

Almost surely, 2^{155335727752649} is an apocalyptic number.

It is an amenable number.

155335727752649 is a deficient number, since it is larger than the sum of its proper divisors (1).

155335727752649 is an equidigital number, since it uses as much as digits as its factorization.

155335727752649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1666980000, while the sum is 71.

The spelling of 155335727752649 in words is "one hundred fifty-five trillion, three hundred thirty-five billion, seven hundred twenty-seven million, seven hundred fifty-two thousand, six hundred forty-nine".