155641405 has 16 divisors (see below), whose sum is σ = 193726080. Its totient is φ = 119898688.

The previous prime is 155641403. The next prime is 155641433. The reversal of 155641405 is 504146551.

It is a cyclic number.

It is not a de Polignac number, because 155641405 - 2¹ = 155641403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155641403) 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, 63024 + ... + 65446.

It is an arithmetic number, because the mean of its divisors is an integer number (12107880).

Almost surely, 2^155641405 is an apocalyptic number.

It is an amenable number.

155641405 is a deficient number, since it is larger than the sum of its proper divisors (38084675).

155641405 is a wasteful number, since it uses less digits than its factorization.

155641405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2900.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 155641405 is about 12475.6324488981. The cubic root of 155641405 is about 537.9084675889.

Adding to 155641405 its reverse (504146551), we get a palindrome (659787956).

The spelling of 155641405 in words is "one hundred fifty-five million, six hundred forty-one thousand, four hundred five".