671803778098 has 4 divisors (see below), whose sum is σ = 1007705667150. Its totient is φ = 335901889048.

The previous prime is 671803778071. The next prime is 671803778141. The reversal of 671803778098 is 890877308176.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 660291131889 + 11512646209 = 812583^2 + 107297^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167950944523 + ... + 167950944526.

Almost surely, 2^671803778098 is an apocalyptic number.

671803778098 is a deficient number, since it is larger than the sum of its proper divisors (335901889052).

671803778098 is a wasteful number, since it uses less digits than its factorization.

671803778098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335901889051.

The product of its (nonzero) digits is 28449792, while the sum is 64.

The spelling of 671803778098 in words is "six hundred seventy-one billion, eight hundred three million, seven hundred seventy-eight thousand, ninety-eight".