155478615563 has 2 divisors, whose sum is σ = 155478615564. Its totient is φ = 155478615562.

The previous prime is 155478615493. The next prime is 155478615613. The reversal of 155478615563 is 365516874551.

155478615563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155478615563 - 2²⁸ = 155210180107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 155478615499 and 155478615508.

It is not a weakly prime, because it can be changed into another prime (155478615163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77739307781 + 77739307782.

It is an arithmetic number, because the mean of its divisors is an integer number (77739307782).

Almost surely, 2^155478615563 is an apocalyptic number.

155478615563 is a deficient number, since it is larger than the sum of its proper divisors (1).

155478615563 is an equidigital number, since it uses as much as digits as its factorization.

155478615563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120000, while the sum is 56.

The spelling of 155478615563 in words is "one hundred fifty-five billion, four hundred seventy-eight million, six hundred fifteen thousand, five hundred sixty-three".