155672663 has 4 divisors (see below), whose sum is σ = 156898560. Its totient is φ = 154446768.

The previous prime is 155672651. The next prime is 155672701. The reversal of 155672663 is 366276551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 366276551 = 73 ⋅5017487.

It is a cyclic number.

It is not a de Polignac number, because 155672663 - 2¹⁰ = 155671639 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 155672663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155672603) 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 3 ways as a sum of consecutive naturals, for example, 612758 + ... + 613011.

It is an arithmetic number, because the mean of its divisors is an integer number (39224640).

Almost surely, 2^155672663 is an apocalyptic number.

155672663 is a deficient number, since it is larger than the sum of its proper divisors (1225897).

155672663 is a wasteful number, since it uses less digits than its factorization.

155672663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225896.

The product of its digits is 226800, while the sum is 41.

The square root of 155672663 is about 12476.8851481449. The cubic root of 155672663 is about 537.9444751825.

The spelling of 155672663 in words is "one hundred fifty-five million, six hundred seventy-two thousand, six hundred sixty-three".