155383928465481 has 9 divisors (see below), whose sum is σ = 224443506244269. Its totient is φ = 103589260713036.

The previous prime is 155383928465473. The next prime is 155383928465501. The reversal of 155383928465481 is 184564829383551.

It is a happy number.

The square root of 155383928465481 is 12465309.

It is a perfect power (a square), and thus also a powerful number.

155383928465481 is a `hidden beast` number, since 1 + 5 + 5 + 3 + 8 + 3 + 9 + 2 + 84 + 65 + 481 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 155383928465481 - 2³ = 155383928465473 is a prime.

It is a super-2 number, since 2×155383928465481² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (155383928469481) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 35318376 + ... + 39473478.

Almost surely, 2^{155383928465481} is an apocalyptic number.

155383928465481 is the 12465309-th square number.

155383928465481 is the 6232655-th centered octagonal number.

It is an amenable number.

155383928465481 is a deficient number, since it is larger than the sum of its proper divisors (69059577778788).

155383928465481 is an frugal number, since it uses more digits than its factorization.

155383928465481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8310212 (or 4155106 counting only the distinct ones).

The product of its digits is 995328000, while the sum is 72.

The spelling of 155383928465481 in words is "one hundred fifty-five trillion, three hundred eighty-three billion, nine hundred twenty-eight million, four hundred sixty-five thousand, four hundred eighty-one".