155691248222399 has 4 divisors (see below), whose sum is σ = 156161614531560. Its totient is φ = 155220881913240.

The previous prime is 155691248222387. The next prime is 155691248222407. The reversal of 155691248222399 is 993222842196551.

155691248222399 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 155691248222399 - 2³² = 155686953255103 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 (155691248222309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 235183154084 + ... + 235183154745.

It is an arithmetic number, because the mean of its divisors is an integer number (39040403632890).

Almost surely, 2^{155691248222399} is an apocalyptic number.

155691248222399 is a deficient number, since it is larger than the sum of its proper divisors (470366309161).

155691248222399 is an equidigital number, since it uses as much as digits as its factorization.

155691248222399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470366309160.

The product of its digits is 167961600, while the sum is 68.

The spelling of 155691248222399 in words is "one hundred fifty-five trillion, six hundred ninety-one billion, two hundred forty-eight million, two hundred twenty-two thousand, three hundred ninety-nine".