671118942552 has 256 divisors, whose sum is σ = 1900184832000. Its totient is φ = 196262756352.

The previous prime is 671118942551. The next prime is 671118942709. The reversal of 671118942552 is 255249811176.

It is a super-2 number, since 2×671118942552² (a number of 24 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 671118942495 and 671118942504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671118942551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 194131608 + ... + 194135064.

It is an arithmetic number, because the mean of its divisors is an integer number (7422597000).

Almost surely, 2^671118942552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 671118942552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (950092416000).

671118942552 is an abundant number, since it is smaller than the sum of its proper divisors (1229065889448).

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

671118942552 is a wasteful number, since it uses less digits than its factorization.

671118942552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3898 (or 3894 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 51.

The spelling of 671118942552 in words is "six hundred seventy-one billion, one hundred eighteen million, nine hundred forty-two thousand, five hundred fifty-two".