1205670706651 has 4 divisors (see below), whose sum is σ = 1205740043352. Its totient is φ = 1205601369952.

The previous prime is 1205670706613. The next prime is 1205670706663. The reversal of 1205670706651 is 1566070765021.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1205670706651 - 2³¹ = 1203523223003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1205670706451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34642261 + ... + 34677046.

It is an arithmetic number, because the mean of its divisors is an integer number (301435010838).

Almost surely, 2^{1205670706651} is an apocalyptic number.

1205670706651 is a deficient number, since it is larger than the sum of its proper divisors (69336701).

1205670706651 is an equidigital number, since it uses as much as digits as its factorization.

1205670706651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69336700.

The product of its (nonzero) digits is 529200, while the sum is 46.

The spelling of 1205670706651 in words is "one trillion, two hundred five billion, six hundred seventy million, seven hundred six thousand, six hundred fifty-one".