2061765091 has 2 divisors, whose sum is σ = 2061765092. Its totient is φ = 2061765090.

The previous prime is 2061765037. The next prime is 2061765119. The reversal of 2061765091 is 1905671602.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2061765091 is a prime.

It is a super-3 number, since 3×2061765091³ (a number of 29 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2061765091.

It is not a weakly prime, because it can be changed into another prime (2001765091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1030882545 + 1030882546.

It is an arithmetic number, because the mean of its divisors is an integer number (1030882546).

Almost surely, 2^2061765091 is an apocalyptic number.

2061765091 is a deficient number, since it is larger than the sum of its proper divisors (1).

2061765091 is an equidigital number, since it uses as much as digits as its factorization.

2061765091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 2061765091 is about 45406.6635087847. The cubic root of 2061765091 is about 1272.7596367962.

The spelling of 2061765091 in words is "two billion, sixty-one million, seven hundred sixty-five thousand, ninety-one".