155251645 has 16 divisors (see below), whose sum is σ = 194652720. Its totient is φ = 118720000.

The previous prime is 155251631. The next prime is 155251661. The reversal of 155251645 is 546152551.

It can be written as a sum of positive squares in 8 ways, for example, as 27154521 + 128097124 = 5211^2 + 11318^2 .

It is not a de Polignac number, because 155251645 - 2⁷ = 155251517 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 155251645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9345 + ... + 19945.

It is an arithmetic number, because the mean of its divisors is an integer number (12165795).

Almost surely, 2^155251645 is an apocalyptic number.

It is an amenable number.

155251645 is a deficient number, since it is larger than the sum of its proper divisors (39401075).

155251645 is a wasteful number, since it uses less digits than its factorization.

155251645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10736.

The product of its digits is 30000, while the sum is 34.

The square root of 155251645 is about 12460.0018057784. The cubic root of 155251645 is about 537.4590789110.

The spelling of 155251645 in words is "one hundred fifty-five million, two hundred fifty-one thousand, six hundred forty-five".