201956393770 has 8 divisors (see below), whose sum is σ = 363521508804. Its totient is φ = 80782557504.

The previous prime is 201956393767. The next prime is 201956393783. The reversal of 201956393770 is 77393659102.

It can be written as a sum of positive squares in 2 ways, for example, as 201921713449 + 34680321 = 449357^2 + 5889^2 .

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

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, 10097819679 + ... + 10097819698.

Almost surely, 2^201956393770 is an apocalyptic number.

201956393770 is a deficient number, since it is larger than the sum of its proper divisors (161565115034).

201956393770 is a wasteful number, since it uses less digits than its factorization.

201956393770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20195639384.

The product of its (nonzero) digits is 2143260, while the sum is 52.

The spelling of 201956393770 in words is "two hundred one billion, nine hundred fifty-six million, three hundred ninety-three thousand, seven hundred seventy".