671237194890 has 32 divisors (see below), whose sum is σ = 1617883315776. Its totient is φ = 178228357760.

The previous prime is 671237194867. The next prime is 671237194907. The reversal of 671237194890 is 98491732176.

It is a happy number.

It is a super-2 number, since 2×671237194890² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 671237194890.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 48007116 + ... + 48021095.

It is an arithmetic number, because the mean of its divisors is an integer number (50558853618).

Almost surely, 2^671237194890 is an apocalyptic number.

671237194890 is an abundant number, since it is smaller than the sum of its proper divisors (946646120886).

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

671237194890 is a wasteful number, since it uses less digits than its factorization.

671237194890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96028454.

The product of its (nonzero) digits is 4572288, while the sum is 57.

The spelling of 671237194890 in words is "six hundred seventy-one billion, two hundred thirty-seven million, one hundred ninety-four thousand, eight hundred ninety".