155507623 has 8 divisors (see below), whose sum is σ = 162440928. Its totient is φ = 148588704.

The previous prime is 155507557. The next prime is 155507641. The reversal of 155507623 is 326705551.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155507623 is a prime.

It is a super-2 number, since 2×155507623² = 48365241622220258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155507423) 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, 22665 + ... + 28717.

It is an arithmetic number, because the mean of its divisors is an integer number (20305116).

Almost surely, 2^155507623 is an apocalyptic number.

155507623 is a deficient number, since it is larger than the sum of its proper divisors (6933305).

155507623 is a wasteful number, since it uses less digits than its factorization.

155507623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7193.

The product of its (nonzero) digits is 31500, while the sum is 34.

The square root of 155507623 is about 12470.2695640471. The cubic root of 155507623 is about 537.7543031728.

The spelling of 155507623 in words is "one hundred fifty-five million, five hundred seven thousand, six hundred twenty-three".