155945663 has 8 divisors (see below), whose sum is σ = 159415776. Its totient is φ = 152495200.

The previous prime is 155945659. The next prime is 155945683. The reversal of 155945663 is 366549551.

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 155945663 - 2² = 155945659 is a prime.

It is a super-3 number, since 3×155945663³ (a number of 26 digits) contains 333 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 (155945623) 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, 11753 + ... + 21213.

It is an arithmetic number, because the mean of its divisors is an integer number (19926972).

Almost surely, 2^155945663 is an apocalyptic number.

155945663 is a deficient number, since it is larger than the sum of its proper divisors (3470113).

155945663 is an equidigital number, since it uses as much as digits as its factorization.

155945663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9825.

The product of its digits is 486000, while the sum is 44.

The square root of 155945663 is about 12487.8205864754. The cubic root of 155945663 is about 538.2587523216.

The spelling of 155945663 in words is "one hundred fifty-five million, nine hundred forty-five thousand, six hundred sixty-three".