155164639 has 8 divisors (see below), whose sum is σ = 179760800. Its totient is φ = 131175936.

The previous prime is 155164637. The next prime is 155164649. The reversal of 155164639 is 936461551.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 155164639 - 2¹ = 155164637 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 (155164637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151314 + ... + 152335.

It is an arithmetic number, because the mean of its divisors is an integer number (22470100).

Almost surely, 2^155164639 is an apocalyptic number.

155164639 is a deficient number, since it is larger than the sum of its proper divisors (24596161).

155164639 is an equidigital number, since it uses as much as digits as its factorization.

155164639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303729.

The product of its digits is 97200, while the sum is 40.

The square root of 155164639 is about 12456.5099044636. The cubic root of 155164639 is about 537.3586593571.

The spelling of 155164639 in words is "one hundred fifty-five million, one hundred sixty-four thousand, six hundred thirty-nine".