671265550780 has 36 divisors (see below), whose sum is σ = 1549458421560. Its totient is φ = 244096563040.

The previous prime is 671265550777. The next prime is 671265550783. The reversal of 671265550780 is 87055562176.

671265550780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (671265550777) and next prime (671265550783).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671265550783) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 138688810 + ... + 138693649.

It is an arithmetic number, because the mean of its divisors is an integer number (43040511710).

Almost surely, 2^671265550780 is an apocalyptic number.

It is an amenable number.

671265550780 is an abundant number, since it is smaller than the sum of its proper divisors (878192870780).

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

671265550780 is a wasteful number, since it uses less digits than its factorization.

671265550780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277382490 (or 277382477 counting only the distinct ones).

The product of its (nonzero) digits is 3528000, while the sum is 52.

The spelling of 671265550780 in words is "six hundred seventy-one billion, two hundred sixty-five million, five hundred fifty thousand, seven hundred eighty".