155281565667 has 4 divisors (see below), whose sum is σ = 207042087560. Its totient is φ = 103521043776.

The previous prime is 155281565623. The next prime is 155281565689. The reversal of 155281565667 is 766565182551.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 155281565667 - 2⁷ = 155281565539 is a prime.

It is a super-2 number, since 2×155281565667² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155281565617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25880260942 + ... + 25880260947.

It is an arithmetic number, because the mean of its divisors is an integer number (51760521890).

Almost surely, 2^155281565667 is an apocalyptic number.

155281565667 is a deficient number, since it is larger than the sum of its proper divisors (51760521893).

155281565667 is an equidigital number, since it uses as much as digits as its factorization.

155281565667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51760521892.

The product of its digits is 15120000, while the sum is 57.

The spelling of 155281565667 in words is "one hundred fifty-five billion, two hundred eighty-one million, five hundred sixty-five thousand, six hundred sixty-seven".