155235403547 has 4 divisors (see below), whose sum is σ = 177411889776. Its totient is φ = 133058917320.

The previous prime is 155235403523. The next prime is 155235403601. The reversal of 155235403547 is 745304532551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 745304532551 = 61 ⋅12218107091.

It is not a de Polignac number, because 155235403547 - 2²⁶ = 155168294683 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155235403498 and 155235403507.

It is not an unprimeable number, because it can be changed into a prime (155235403747) 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, 11088243104 + ... + 11088243117.

It is an arithmetic number, because the mean of its divisors is an integer number (44352972444).

Almost surely, 2^155235403547 is an apocalyptic number.

155235403547 is a deficient number, since it is larger than the sum of its proper divisors (22176486229).

155235403547 is an equidigital number, since it uses as much as digits as its factorization.

155235403547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22176486228.

The product of its (nonzero) digits is 1260000, while the sum is 44.

The spelling of 155235403547 in words is "one hundred fifty-five billion, two hundred thirty-five million, four hundred three thousand, five hundred forty-seven".