155345761 has 16 divisors (see below), whose sum is σ = 163296000. Its totient is φ = 147644800.

The previous prime is 155345759. The next prime is 155345789. The reversal of 155345761 is 167543551.

It is a cyclic number.

It is not a de Polignac number, because 155345761 - 2¹ = 155345759 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155345761.

It is not an unprimeable number, because it can be changed into a prime (155345461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 360216 + ... + 360646.

It is an arithmetic number, because the mean of its divisors is an integer number (10206000).

Almost surely, 2^155345761 is an apocalyptic number.

It is an amenable number.

155345761 is a deficient number, since it is larger than the sum of its proper divisors (7950239).

155345761 is a wasteful number, since it uses less digits than its factorization.

155345761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680.

The product of its digits is 63000, while the sum is 37.

The square root of 155345761 is about 12463.7779585485. Note that the first 3 decimals coincide. The cubic root of 155345761 is about 537.5676623672.

The spelling of 155345761 in words is "one hundred fifty-five million, three hundred forty-five thousand, seven hundred sixty-one".