671064540648 has 48 divisors (see below), whose sum is σ = 1782152388480. Its totient is φ = 210530049792.

The previous prime is 671064540637. The next prime is 671064540659. The reversal of 671064540648 is 846045460176.

It is an interprime number because it is at equal distance from previous prime (671064540637) and next prime (671064540659).

It is a super-3 number, since 3×671064540648³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 671064540648.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48368536 + ... + 48382407.

It is an arithmetic number, because the mean of its divisors is an integer number (37128174760).

Almost surely, 2^671064540648 is an apocalyptic number.

671064540648 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

671064540648 is an abundant number, since it is smaller than the sum of its proper divisors (1111087847832).

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

671064540648 is a wasteful number, since it uses less digits than its factorization.

671064540648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96750986 (or 96750965 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 51.

The spelling of 671064540648 in words is "six hundred seventy-one billion, sixty-four million, five hundred forty thousand, six hundred forty-eight".