681670049236 has 12 divisors (see below), whose sum is σ = 1301370094080. Its totient is φ = 309850022360.

The previous prime is 681670049189. The next prime is 681670049261. The reversal of 681670049236 is 632940076186.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7746250516 + ... + 7746250603.

It is an arithmetic number, because the mean of its divisors is an integer number (108447507840).

Almost surely, 2^681670049236 is an apocalyptic number.

It is an amenable number.

681670049236 is a deficient number, since it is larger than the sum of its proper divisors (619700044844).

681670049236 is a wasteful number, since it uses less digits than its factorization.

681670049236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15492501134 (or 15492501132 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 52.

The spelling of 681670049236 in words is "six hundred eighty-one billion, six hundred seventy million, forty-nine thousand, two hundred thirty-six".