155345321646 has 48 divisors (see below), whose sum is σ = 337602710016. Its totient is φ = 51624787968.

The previous prime is 155345321597. The next prime is 155345321647. The reversal of 155345321646 is 646123543551.

It is a happy number.

155345321646 is a `hidden beast` number, since 1 + 5 + 53 + 4 + 532 + 1 + 64 + 6 = 666.

It is a super-2 number, since 2×155345321646² (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 (155345321647) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31110126 + ... + 31115118.

It is an arithmetic number, because the mean of its divisors is an integer number (7033389792).

Almost surely, 2^155345321646 is an apocalyptic number.

155345321646 is an abundant number, since it is smaller than the sum of its proper divisors (182257388370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155345321646 is a wasteful number, since it uses less digits than its factorization.

155345321646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9897 (or 9894 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 45.

The spelling of 155345321646 in words is "one hundred fifty-five billion, three hundred forty-five million, three hundred twenty-one thousand, six hundred forty-six".