155691326 has 12 divisors (see below), whose sum is σ = 271665648. Its totient is φ = 66724812.

The previous prime is 155691311. The next prime is 155691359. The reversal of 155691326 is 623196551.

It is a self number, because there is not a number n which added to its sum of digits gives 155691326.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 794246 + ... + 794441.

It is an arithmetic number, because the mean of its divisors is an integer number (22638804).

Almost surely, 2^155691326 is an apocalyptic number.

155691326 is a deficient number, since it is larger than the sum of its proper divisors (115974322).

155691326 is a wasteful number, since it uses less digits than its factorization.

155691326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1588703 (or 1588696 counting only the distinct ones).

The product of its digits is 48600, while the sum is 38.

The square root of 155691326 is about 12477.6330287439. The cubic root of 155691326 is about 537.9659716919.

The spelling of 155691326 in words is "one hundred fifty-five million, six hundred ninety-one thousand, three hundred twenty-six".