671928732121 has 8 divisors (see below), whose sum is σ = 695169563904. Its totient is φ = 648785757360.

The previous prime is 671928732073. The next prime is 671928732127. The reversal of 671928732121 is 121237829176.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-671928732121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671928732127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24450286 + ... + 24477751.

It is an arithmetic number, because the mean of its divisors is an integer number (86896195488).

Almost surely, 2^671928732121 is an apocalyptic number.

It is an amenable number.

671928732121 is a deficient number, since it is larger than the sum of its proper divisors (23240831783).

671928732121 is a wasteful number, since it uses less digits than its factorization.

671928732121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48928511.

The product of its digits is 508032, while the sum is 49.

The spelling of 671928732121 in words is "six hundred seventy-one billion, nine hundred twenty-eight million, seven hundred thirty-two thousand, one hundred twenty-one".