155523551402255 has 4 divisors (see below), whose sum is σ = 186628261682712. Its totient is φ = 124418841121800.

The previous prime is 155523551402251. The next prime is 155523551402279. The reversal of 155523551402255 is 552204155325551.

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

It is not a de Polignac number, because 155523551402255 - 2² = 155523551402251 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 (155523551402251) 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, 15552355140221 + ... + 15552355140230.

It is an arithmetic number, because the mean of its divisors is an integer number (46657065420678).

Almost surely, 2^{155523551402255} is an apocalyptic number.

155523551402255 is a deficient number, since it is larger than the sum of its proper divisors (31104710280457).

155523551402255 is an equidigital number, since it uses as much as digits as its factorization.

155523551402255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31104710280456.

The product of its (nonzero) digits is 7500000, while the sum is 50.

The spelling of 155523551402255 in words is "one hundred fifty-five trillion, five hundred twenty-three billion, five hundred fifty-one million, four hundred two thousand, two hundred fifty-five".