155105155601 has 4 divisors (see below), whose sum is σ = 169205624304. Its totient is φ = 141004686900.

The previous prime is 155105155561. The next prime is 155105155633. The reversal of 155105155601 is 106551501551.

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 not a de Polignac number, because 155105155601 - 2¹⁰ = 155105154577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155105155301) 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, 7050234335 + ... + 7050234356.

It is an arithmetic number, because the mean of its divisors is an integer number (42301406076).

Almost surely, 2^155105155601 is an apocalyptic number.

155105155601 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

155105155601 is a deficient number, since it is larger than the sum of its proper divisors (14100468703).

155105155601 is a wasteful number, since it uses less digits than its factorization.

155105155601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14100468702.

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

The spelling of 155105155601 in words is "one hundred fifty-five billion, one hundred five million, one hundred fifty-five thousand, six hundred one".