155381777333 has 8 divisors (see below), whose sum is σ = 164528668440. Its totient is φ = 146235640320.

The previous prime is 155381777323. The next prime is 155381777347. The reversal of 155381777333 is 333777183551.

It can be written as a sum of positive squares in 4 ways, for example, as 49309755364 + 106072021969 = 222058^2 + 325687^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 155381777333 - 2¹⁰ = 155381776309 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 (155381777303) 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, 267203 + ... + 618191.

It is an arithmetic number, because the mean of its divisors is an integer number (20566083555).

Almost surely, 2^155381777333 is an apocalyptic number.

It is an amenable number.

155381777333 is a deficient number, since it is larger than the sum of its proper divisors (9146891107).

155381777333 is a wasteful number, since it uses less digits than its factorization.

155381777333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377047.

The product of its digits is 5556600, while the sum is 53.

The spelling of 155381777333 in words is "one hundred fifty-five billion, three hundred eighty-one million, seven hundred seventy-seven thousand, three hundred thirty-three".