155478615554 has 8 divisors (see below), whose sum is σ = 233219636748. Its totient is φ = 77738736640.

The previous prime is 155478615493. The next prime is 155478615563. The reversal of 155478615554 is 455516874551.

It can be written as a sum of positive squares in 2 ways, for example, as 153323149225 + 2155466329 = 391565^2 + 46427^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 155478615554.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 274034 + ... + 621330.

Almost surely, 2^155478615554 is an apocalyptic number.

155478615554 is a deficient number, since it is larger than the sum of its proper divisors (77741021194).

155478615554 is a wasteful number, since it uses less digits than its factorization.

155478615554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571140.

The product of its digits is 16800000, while the sum is 56.

The spelling of 155478615554 in words is "one hundred fifty-five billion, four hundred seventy-eight million, six hundred fifteen thousand, five hundred fifty-four".