155672045 has 4 divisors (see below), whose sum is σ = 186806460. Its totient is φ = 124537632.

The previous prime is 155671991. The next prime is 155672047. The reversal of 155672045 is 540276551.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45778756 + 109893289 = 6766^2 + 10483^2 .

It is a cyclic number.

It is not a de Polignac number, because 155672045 - 2¹⁶ = 155606509 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 155671996 and 155672014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155672047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15567200 + ... + 15567209.

It is an arithmetic number, because the mean of its divisors is an integer number (46701615).

Almost surely, 2^155672045 is an apocalyptic number.

It is an amenable number.

155672045 is a deficient number, since it is larger than the sum of its proper divisors (31134415).

155672045 is an equidigital number, since it uses as much as digits as its factorization.

155672045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31134414.

The product of its (nonzero) digits is 42000, while the sum is 35.

The square root of 155672045 is about 12476.8603823238. The cubic root of 155672045 is about 537.9437633253.

The spelling of 155672045 in words is "one hundred fifty-five million, six hundred seventy-two thousand, forty-five".