201961765937 has 2 divisors, whose sum is σ = 201961765938. Its totient is φ = 201961765936.

The previous prime is 201961765931. The next prime is 201961765949. The reversal of 201961765937 is 739567169102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 143579608561 + 58382157376 = 378919^2 + 241624^2 .

It is a cyclic number.

It is not a de Polignac number, because 201961765937 - 2¹⁰ = 201961764913 is a prime.

It is not a weakly prime, because it can be changed into another prime (201961765931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100980882968 + 100980882969.

It is an arithmetic number, because the mean of its divisors is an integer number (100980882969).

Almost surely, 2^201961765937 is an apocalyptic number.

It is an amenable number.

201961765937 is a deficient number, since it is larger than the sum of its proper divisors (1).

201961765937 is an equidigital number, since it uses as much as digits as its factorization.

201961765937 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4286520, while the sum is 56.

The spelling of 201961765937 in words is "two hundred one billion, nine hundred sixty-one million, seven hundred sixty-five thousand, nine hundred thirty-seven".