155378425 has 12 divisors (see below), whose sum is σ = 194836860. Its totient is φ = 122904320.

The previous prime is 155378401. The next prime is 155378437. The reversal of 155378425 is 524873551.

155378425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 46635241 + 108743184 = 6829^2 + 10428^2 .

It is not a de Polignac number, because 155378425 - 2⁷ = 155378297 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32692 + ... + 37141.

It is an arithmetic number, because the mean of its divisors is an integer number (16236405).

Almost surely, 2^155378425 is an apocalyptic number.

It is an amenable number.

155378425 is a deficient number, since it is larger than the sum of its proper divisors (39458435).

155378425 is an equidigital number, since it uses as much as digits as its factorization.

155378425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69932 (or 69927 counting only the distinct ones).

The product of its digits is 168000, while the sum is 40.

The square root of 155378425 is about 12465.0882467795. The cubic root of 155378425 is about 537.6053372062.

The spelling of 155378425 in words is "one hundred fifty-five million, three hundred seventy-eight thousand, four hundred twenty-five".