155545434411 has 4 divisors (see below), whose sum is σ = 207393912552. Its totient is φ = 103696956272.

The previous prime is 155545434391. The next prime is 155545434419. The reversal of 155545434411 is 114434545551.

It is a happy number.

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 155545434411 - 2¹⁵ = 155545401643 is a prime.

It is a super-2 number, since 2×155545434411² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (155545434419) 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, 25924239066 + ... + 25924239071.

It is an arithmetic number, because the mean of its divisors is an integer number (51848478138).

Almost surely, 2^155545434411 is an apocalyptic number.

155545434411 is a deficient number, since it is larger than the sum of its proper divisors (51848478141).

155545434411 is an equidigital number, since it uses as much as digits as its factorization.

155545434411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51848478140.

The product of its digits is 480000, while the sum is 42.

Adding to 155545434411 its reverse (114434545551), we get a palindrome (269979979962).

The spelling of 155545434411 in words is "one hundred fifty-five billion, five hundred forty-five million, four hundred thirty-four thousand, four hundred eleven".