155280843607780 has 48 divisors (see below), whose sum is σ = 355895044916544. Its totient is φ = 56440245653120.

The previous prime is 155280843607777. The next prime is 155280843607787. The reversal of 155280843607780 is 87706348082551.

It is a super-2 number, since 2×155280843607780² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (155280843607787) 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, 158984902 + ... + 159958621.

It is an arithmetic number, because the mean of its divisors is an integer number (7414480102428).

Almost surely, 2^{155280843607780} is an apocalyptic number.

155280843607780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155280843607780 is an abundant number, since it is smaller than the sum of its proper divisors (200614201308764).

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

155280843607780 is a wasteful number, since it uses less digits than its factorization.

155280843607780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318945756 (or 318945754 counting only the distinct ones).

The product of its (nonzero) digits is 90316800, while the sum is 64.

The spelling of 155280843607780 in words is "one hundred fifty-five trillion, two hundred eighty billion, eight hundred forty-three million, six hundred seven thousand, seven hundred eighty".