155398975554 has 128 divisors (see below), whose sum is σ = 335817031680. Its totient is φ = 47823266304.

The previous prime is 155398975447. The next prime is 155398975603. The reversal of 155398975554 is 455579893551.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 305302252 + ... + 305302760.

It is an arithmetic number, because the mean of its divisors is an integer number (2623570560).

Almost surely, 2^155398975554 is an apocalyptic number.

155398975554 is an abundant number, since it is smaller than the sum of its proper divisors (180418056126).

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

155398975554 is a wasteful number, since it uses less digits than its factorization.

155398975554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1144.

The product of its digits is 170100000, while the sum is 66.

The spelling of 155398975554 in words is "one hundred fifty-five billion, three hundred ninety-eight million, nine hundred seventy-five thousand, five hundred fifty-four".