155561772210480 has 60 divisors (see below), whose sum is σ = 522428285009280. Its totient is φ = 41483139255936.

The previous prime is 155561772210451. The next prime is 155561772210497. The reversal of 155561772210480 is 84012277165551.

155561772210480 is a `hidden beast` number, since 1 + 5 + 5 + 5 + 61 + 77 + 22 + 10 + 480 = 666.

It is a tau number, because it is divible by the number of its divisors (60).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 108029007760 + ... + 108029009199.

It is an arithmetic number, because the mean of its divisors is an integer number (8707138083488).

Almost surely, 2^{155561772210480} is an apocalyptic number.

155561772210480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155561772210480 is an abundant number, since it is smaller than the sum of its proper divisors (366866512798800).

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

155561772210480 is a wasteful number, since it uses less digits than its factorization.

155561772210480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216058016978 (or 216058016969 counting only the distinct ones).

The product of its (nonzero) digits is 4704000, while the sum is 54.

The spelling of 155561772210480 in words is "one hundred fifty-five trillion, five hundred sixty-one billion, seven hundred seventy-two million, two hundred ten thousand, four hundred eighty".