155136727901 has 2 divisors, whose sum is σ = 155136727902. Its totient is φ = 155136727900.

The previous prime is 155136727847. The next prime is 155136727919. The reversal of 155136727901 is 109727631551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 155136727876 + 25 = 393874^2 + 5^2 .

It is an emirp because it is prime and its reverse (109727631551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155136727901 - 2²² = 155132533597 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155136727931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77568363950 + 77568363951.

It is an arithmetic number, because the mean of its divisors is an integer number (77568363951).

Almost surely, 2^155136727901 is an apocalyptic number.

It is an amenable number.

155136727901 is a deficient number, since it is larger than the sum of its proper divisors (1).

155136727901 is an equidigital number, since it uses as much as digits as its factorization.

155136727901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 396900, while the sum is 47.

The spelling of 155136727901 in words is "one hundred fifty-five billion, one hundred thirty-six million, seven hundred twenty-seven thousand, nine hundred one".