671155501263655 has 16 divisors (see below), whose sum is σ = 840620177256384. Its totient is φ = 513447393127680.

The previous prime is 671155501263649. The next prime is 671155501263677. The reversal of 671155501263655 is 556362105551176.

It is a de Polignac number, because none of the positive numbers 2^k-671155501263655 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 671155501263655.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 752215326 + ... + 753107035.

It is an arithmetic number, because the mean of its divisors is an integer number (52538761078524).

Almost surely, 2^{671155501263655} is an apocalyptic number.

671155501263655 is a deficient number, since it is larger than the sum of its proper divisors (169464675992729).

671155501263655 is a wasteful number, since it uses less digits than its factorization.

671155501263655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1505326266.

The product of its (nonzero) digits is 28350000, while the sum is 58.

The spelling of 671155501263655 in words is "six hundred seventy-one trillion, one hundred fifty-five billion, five hundred one million, two hundred sixty-three thousand, six hundred fifty-five".