1951765061 has 2 divisors, whose sum is σ = 1951765062. Its totient is φ = 1951765060.

The previous prime is 1951765051. The next prime is 1951765069. The reversal of 1951765061 is 1605671591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1950988900 + 776161 = 44170^2 + 881^2 .

It is a cyclic number.

It is not a de Polignac number, because 1951765061 - 2¹⁴ = 1951748677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1951765069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 975882530 + 975882531.

It is an arithmetic number, because the mean of its divisors is an integer number (975882531).

Almost surely, 2^1951765061 is an apocalyptic number.

It is an amenable number.

1951765061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1951765061 is an equidigital number, since it uses as much as digits as its factorization.

1951765061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56700, while the sum is 41.

The square root of 1951765061 is about 44178.7851915374. The cubic root of 1951765061 is about 1249.7098123181.

The spelling of 1951765061 in words is "one billion, nine hundred fifty-one million, seven hundred sixty-five thousand, sixty-one".