155421366115211 has 8 divisors (see below), whose sum is σ = 177628226469600. Its totient is φ = 133215457773888.

The previous prime is 155421366115189. The next prime is 155421366115259. The reversal of 155421366115211 is 112511663124551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 155421366115211 - 2³⁴ = 155404186246027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155421366115291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 237653396 + ... + 238306481.

It is an arithmetic number, because the mean of its divisors is an integer number (22203528308700).

Almost surely, 2^{155421366115211} is an apocalyptic number.

155421366115211 is a deficient number, since it is larger than the sum of its proper divisors (22206860354389).

155421366115211 is an equidigital number, since it uses as much as digits as its factorization.

155421366115211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476006533.

The product of its digits is 216000, while the sum is 44.

The spelling of 155421366115211 in words is "one hundred fifty-five trillion, four hundred twenty-one billion, three hundred sixty-six million, one hundred fifteen thousand, two hundred eleven".