155155888551551 has 4 divisors (see below), whose sum is σ = 155158866472272. Its totient is φ = 155152910630832.

The previous prime is 155155888551527. The next prime is 155155888551679.

155155888551551 is nontrivially palindromic in base 10.

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 155155888551551 - 2²² = 155155884357247 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 (155155888553551) 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, 1488882206 + ... + 1488986411.

It is an arithmetic number, because the mean of its divisors is an integer number (38789716618068).

Almost surely, 2^{155155888551551} is an apocalyptic number.

155155888551551 is a deficient number, since it is larger than the sum of its proper divisors (2977920721).

155155888551551 is an equidigital number, since it uses as much as digits as its factorization.

155155888551551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2977920720.

The product of its digits is 200000000, while the sum is 68.

The spelling of 155155888551551 in words is "one hundred fifty-five trillion, one hundred fifty-five billion, eight hundred eighty-eight million, five hundred fifty-one thousand, five hundred fifty-one".