155555011601 has 4 divisors (see below), whose sum is σ = 169696376304. Its totient is φ = 141413646900.

The previous prime is 155555011543. The next prime is 155555011621. The reversal of 155555011601 is 106110555551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 155555011601 - 2¹⁴ = 155554995217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155555011621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7070682335 + ... + 7070682356.

It is an arithmetic number, because the mean of its divisors is an integer number (42424094076).

Almost surely, 2^155555011601 is an apocalyptic number.

155555011601 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

155555011601 is a deficient number, since it is larger than the sum of its proper divisors (14141364703).

155555011601 is a wasteful number, since it uses less digits than its factorization.

155555011601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14141364702.

The product of its (nonzero) digits is 18750, while the sum is 35.

The spelling of 155555011601 in words is "one hundred fifty-five billion, five hundred fifty-five million, eleven thousand, six hundred one".