671061091000 has 64 divisors (see below), whose sum is σ = 1570443526080. Its totient is φ = 268396988800.

The previous prime is 671061090971. The next prime is 671061091013. The reversal of 671061091000 is 190160176.

It is a super-2 number, since 2×671061091000² (a number of 24 digits) contains 22 as substring.

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, 11784597 + ... + 11841403.

It is an arithmetic number, because the mean of its divisors is an integer number (24538180095).

Almost surely, 2^671061091000 is an apocalyptic number.

It is an amenable number.

671061091000 is an abundant number, since it is smaller than the sum of its proper divisors (899382435080).

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

671061091000 is a wasteful number, since it uses less digits than its factorization.

671061091000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68641 (or 68627 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 31.

The spelling of 671061091000 in words is "six hundred seventy-one billion, sixty-one million, ninety-one thousand".