155266643 has 12 divisors (see below), whose sum is σ = 180820872. Its totient is φ = 132935040.

The previous prime is 155266637. The next prime is 155266663. The reversal of 155266643 is 346662551.

It is a happy number.

It is not a de Polignac number, because 155266643 - 2²⁴ = 138489427 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155266597 and 155266606.

It is not an unprimeable number, because it can be changed into a prime (155266603) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75971 + ... + 77987.

It is an arithmetic number, because the mean of its divisors is an integer number (15068406).

Almost surely, 2^155266643 is an apocalyptic number.

155266643 is a deficient number, since it is larger than the sum of its proper divisors (25554229).

155266643 is a wasteful number, since it uses less digits than its factorization.

155266643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3602 (or 3595 counting only the distinct ones).

The product of its digits is 129600, while the sum is 38.

The square root of 155266643 is about 12460.6036370635. The cubic root of 155266643 is about 537.4763853335.

The spelling of 155266643 in words is "one hundred fifty-five million, two hundred sixty-six thousand, six hundred forty-three".