155075181570551 has 6 divisors (see below), whose sum is σ = 170454538420656. Its totient is φ = 140977437791300.

The previous prime is 155075181570541. The next prime is 155075181570593.

155075181570551 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 155075181570551 - 2²² = 155075177376247 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 (155075181570521) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 640806535295 + ... + 640806535536.

It is an arithmetic number, because the mean of its divisors is an integer number (28409089736776).

Almost surely, 2^{155075181570551} is an apocalyptic number.

155075181570551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

155075181570551 is the 5569115-th centered decagonal number.

155075181570551 is a deficient number, since it is larger than the sum of its proper divisors (15379356850105).

155075181570551 is a wasteful number, since it uses less digits than its factorization.

155075181570551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1281613070853 (or 1281613070842 counting only the distinct ones).

The product of its (nonzero) digits is 6125000, while the sum is 56.

The spelling of 155075181570551 in words is "one hundred fifty-five trillion, seventy-five billion, one hundred eighty-one million, five hundred seventy thousand, five hundred fifty-one".