155536447 has 4 divisors (see below), whose sum is σ = 169676136. Its totient is φ = 141396760.

The previous prime is 155536427. The next prime is 155536453. The reversal of 155536447 is 744635551.

155536447 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 155536447 - 2¹⁹ = 155012159 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155536427) 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, 7069828 + ... + 7069849.

It is an arithmetic number, because the mean of its divisors is an integer number (42419034).

Almost surely, 2^155536447 is an apocalyptic number.

155536447 is a deficient number, since it is larger than the sum of its proper divisors (14139689).

155536447 is a wasteful number, since it uses less digits than its factorization.

155536447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14139688.

The product of its digits is 252000, while the sum is 40.

The square root of 155536447 is about 12471.4252192763. The cubic root of 155536447 is about 537.7875261367.

The spelling of 155536447 in words is "one hundred fifty-five million, five hundred thirty-six thousand, four hundred forty-seven".