155828408506 has 4 divisors (see below), whose sum is σ = 233742612762. Its totient is φ = 77914204252.

The previous prime is 155828408501. The next prime is 155828408521. The reversal of 155828408506 is 605804828551.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 137029530625 + 18798877881 = 370175^2 + 137109^2 .

It is a super-3 number, since 3×155828408506³ (a number of 35 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (155828408501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38957102125 + ... + 38957102128.

Almost surely, 2^155828408506 is an apocalyptic number.

155828408506 is a deficient number, since it is larger than the sum of its proper divisors (77914204256).

155828408506 is an equidigital number, since it uses as much as digits as its factorization.

155828408506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77914204255.

The product of its (nonzero) digits is 3072000, while the sum is 52.

The spelling of 155828408506 in words is "one hundred fifty-five billion, eight hundred twenty-eight million, four hundred eight thousand, five hundred six".