155828781669 has 16 divisors (see below), whose sum is σ = 230501744640. Its totient is φ = 92840978160.

The previous prime is 155828781611. The next prime is 155828781697. The reversal of 155828781669 is 966187828551.

It is not a de Polignac number, because 155828781669 - 2³¹ = 153681298021 is a prime.

It is a super-2 number, since 2×155828781669² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155828711669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40015717 + ... + 40019610.

It is an arithmetic number, because the mean of its divisors is an integer number (14406359040).

Almost surely, 2^155828781669 is an apocalyptic number.

It is an amenable number.

155828781669 is a deficient number, since it is larger than the sum of its proper divisors (74672962971).

155828781669 is a wasteful number, since it uses less digits than its factorization.

155828781669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80035400.

The product of its digits is 58060800, while the sum is 66.

The spelling of 155828781669 in words is "one hundred fifty-five billion, eight hundred twenty-eight million, seven hundred eighty-one thousand, six hundred sixty-nine".