155478679 has 4 divisors (see below), whose sum is σ = 158786784. Its totient is φ = 152170576.

The previous prime is 155478619. The next prime is 155478707. The reversal of 155478679 is 976874551.

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 155478679 - 2¹¹ = 155476631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155478619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1653982 + ... + 1654075.

It is an arithmetic number, because the mean of its divisors is an integer number (39696696).

Almost surely, 2^155478679 is an apocalyptic number.

155478679 is a deficient number, since it is larger than the sum of its proper divisors (3308105).

155478679 is an equidigital number, since it uses as much as digits as its factorization.

155478679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3308104.

The product of its digits is 2116800, while the sum is 52.

The square root of 155478679 is about 12469.1089898196. The cubic root of 155478679 is about 537.7209377638.

The spelling of 155478679 in words is "one hundred fifty-five million, four hundred seventy-eight thousand, six hundred seventy-nine".