1900161746009 has 2 divisors, whose sum is σ = 1900161746010. Its totient is φ = 1900161746008.

The previous prime is 1900161745969. The next prime is 1900161746011. The reversal of 1900161746009 is 9006471610091.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1590491755609 + 309669990400 = 1261147^2 + 556480^2 .

It is a cyclic number.

It is not a de Polignac number, because 1900161746009 - 2²⁴ = 1900144968793 is a prime.

It is a super-2 number, since 2×1900161746009² (a number of 25 digits) contains 22 as substring.

Together with 1900161746011, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1900161746029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 950080873004 + 950080873005.

It is an arithmetic number, because the mean of its divisors is an integer number (950080873005).

Almost surely, 2^{1900161746009} is an apocalyptic number.

It is an amenable number.

1900161746009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1900161746009 is an equidigital number, since it uses as much as digits as its factorization.

1900161746009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 44.

The spelling of 1900161746009 in words is "one trillion, nine hundred billion, one hundred sixty-one million, seven hundred forty-six thousand, nine".