671155501263656 has 32 divisors (see below), whose sum is σ = 1268342282403840. Its totient is φ = 332930963147328.

The previous prime is 671155501263649. The next prime is 671155501263677. The reversal of 671155501263656 is 656362105551176.

It is a super-2 number, since 2×671155501263656² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 671155501263595 and 671155501263604.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72422390 + ... + 81162266.

It is an arithmetic number, because the mean of its divisors is an integer number (39635696325120).

Almost surely, 2^{671155501263656} is an apocalyptic number.

It is an amenable number.

671155501263656 is a deficient number, since it is larger than the sum of its proper divisors (597186781140184).

671155501263656 is a wasteful number, since it uses less digits than its factorization.

671155501263656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8815593 (or 8815589 counting only the distinct ones).

The product of its (nonzero) digits is 34020000, while the sum is 59.

The spelling of 671155501263656 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-six".