155776397 has 8 divisors (see below), whose sum is σ = 178305600. Its totient is φ = 133316064.

The previous prime is 155776393. The next prime is 155776399. The reversal of 155776397 is 793677551.

155776397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 155776397 - 2² = 155776393 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155776391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12272 + ... + 21497.

It is an arithmetic number, because the mean of its divisors is an integer number (22288200).

Almost surely, 2^155776397 is an apocalyptic number.

It is an amenable number.

155776397 is a deficient number, since it is larger than the sum of its proper divisors (22529203).

155776397 is an equidigital number, since it uses as much as digits as its factorization.

155776397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34435.

The product of its digits is 1389150, while the sum is 50.

The square root of 155776397 is about 12481.0415030157. The cubic root of 155776397 is about 538.0639368373.

The spelling of 155776397 in words is "one hundred fifty-five million, seven hundred seventy-six thousand, three hundred ninety-seven".