671045121450 has 216 divisors, whose sum is σ = 1984914186528. Its totient is φ = 162411480000.

The previous prime is 671045121443. The next prime is 671045121511. The reversal of 671045121450 is 54121540176.

671045121450 is a `hidden beast` number, since 67 + 1 + 0 + 451 + 2 + 145 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 34348185 + ... + 34367715.

Almost surely, 2^671045121450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 671045121450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (992457093264).

671045121450 is an abundant number, since it is smaller than the sum of its proper divisors (1313869065078).

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

671045121450 is a wasteful number, since it uses less digits than its factorization.

671045121450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20202 (or 20183 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The spelling of 671045121450 in words is "six hundred seventy-one billion, forty-five million, one hundred twenty-one thousand, four hundred fifty".