155740169 has 16 divisors (see below), whose sum is σ = 177166080. Its totient is φ = 135717120.

The previous prime is 155740163. The next prime is 155740219. The reversal of 155740169 is 961047551.

It is a cyclic number.

It is not a de Polignac number, because 155740169 - 2²⁴ = 138962953 is a prime.

It is a super-2 number, since 2×155740169² = 48510000480297122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (155740163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82304 + ... + 84174.

It is an arithmetic number, because the mean of its divisors is an integer number (11072880).

Almost surely, 2^155740169 is an apocalyptic number.

155740169 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

155740169 is a deficient number, since it is larger than the sum of its proper divisors (21425911).

155740169 is a wasteful number, since it uses less digits than its factorization.

155740169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2240.

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 155740169 is about 12479.5900974351. The cubic root of 155740169 is about 538.0222221489.

The spelling of 155740169 in words is "one hundred fifty-five million, seven hundred forty thousand, one hundred sixty-nine".