155554645 has 16 divisors (see below), whose sum is σ = 190686960. Its totient is φ = 121792000.

The previous prime is 155554643. The next prime is 155554657. The reversal of 155554645 is 546455551.

It can be written as a sum of positive squares in 8 ways, for example, as 1745041 + 153809604 = 1321^2 + 12402^2 .

It is not a de Polignac number, because 155554645 - 2¹ = 155554643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 155554598 and 155554607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155554643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43215 + ... + 46675.

It is an arithmetic number, because the mean of its divisors is an integer number (11917935).

Almost surely, 2^155554645 is an apocalyptic number.

It is an amenable number.

155554645 is a deficient number, since it is larger than the sum of its proper divisors (35132315).

155554645 is a wasteful number, since it uses less digits than its factorization.

155554645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3656.

The product of its digits is 300000, while the sum is 40.

The square root of 155554645 is about 12472.1547857618. The cubic root of 155554645 is about 537.8084993039.

The spelling of 155554645 in words is "one hundred fifty-five million, five hundred fifty-four thousand, six hundred forty-five".