154640505 has 16 divisors (see below), whose sum is σ = 248238144. Its totient is φ = 82203840.

The previous prime is 154640503. The next prime is 154640543. The reversal of 154640505 is 505046451.

154640505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 154640505 - 2¹ = 154640503 is a prime.

It is a super-3 number, since 3×154640505³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (154640503) 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, 12186 + ... + 21395.

It is an arithmetic number, because the mean of its divisors is an integer number (15514884).

Almost surely, 2^154640505 is an apocalyptic number.

154640505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

154640505 is a deficient number, since it is larger than the sum of its proper divisors (93597639).

154640505 is a wasteful number, since it uses less digits than its factorization.

154640505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33896.

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 154640505 is about 12435.4535502329. The cubic root of 154640505 is about 536.7529249791.

Adding to 154640505 its reverse (505046451), we get a palindrome (659686956).

The spelling of 154640505 in words is "one hundred fifty-four million, six hundred forty thousand, five hundred five".