155162101261551 has 4 divisors (see below), whose sum is σ = 206882801682072. Its totient is φ = 103441400841032.

The previous prime is 155162101261529. The next prime is 155162101261577.

155162101261551 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 155162101261551 - 2³⁴ = 155144921392367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155162101261511) 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, 25860350210256 + ... + 25860350210261.

It is an arithmetic number, because the mean of its divisors is an integer number (51720700420518).

Almost surely, 2^{155162101261551} is an apocalyptic number.

155162101261551 is a deficient number, since it is larger than the sum of its proper divisors (51720700420521).

155162101261551 is an equidigital number, since it uses as much as digits as its factorization.

155162101261551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51720700420520.

The product of its (nonzero) digits is 90000, while the sum is 42.

It can be divided in two parts, 15516210 and 1261551, that added together give a palindrome (16777761).

The spelling of 155162101261551 in words is "one hundred fifty-five trillion, one hundred sixty-two billion, one hundred one million, two hundred sixty-one thousand, five hundred fifty-one".