671055561555 has 16 divisors (see below), whose sum is σ = 1075616540064. Its totient is φ = 357253752320.

The previous prime is 671055561529. The next prime is 671055561619. The reversal of 671055561555 is 555165550176.

It is not a de Polignac number, because 671055561555 - 2⁵ = 671055561523 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 671055561498 and 671055561507.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 40150566 + ... + 40167275.

It is an arithmetic number, because the mean of its divisors is an integer number (67226033754).

Almost surely, 2^671055561555 is an apocalyptic number.

671055561555 is a deficient number, since it is larger than the sum of its proper divisors (404560978509).

671055561555 is a wasteful number, since it uses less digits than its factorization.

671055561555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80318406.

The product of its (nonzero) digits is 3937500, while the sum is 51.

The spelling of 671055561555 in words is "six hundred seventy-one billion, fifty-five million, five hundred sixty-one thousand, five hundred fifty-five".