1911192641 has 2 divisors, whose sum is σ = 1911192642. Its totient is φ = 1911192640.

The previous prime is 1911192629. The next prime is 1911192763. The reversal of 1911192641 is 1462911191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1850290225 + 60902416 = 43015^2 + 7804^2 .

It is a cyclic number.

It is not a de Polignac number, because 1911192641 - 2¹⁰ = 1911191617 is a prime.

It is a super-2 number, since 2×1911192641² = 7305314622025109762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1911191641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 955596320 + 955596321.

It is an arithmetic number, because the mean of its divisors is an integer number (955596321).

Almost surely, 2^1911192641 is an apocalyptic number.

It is an amenable number.

1911192641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1911192641 is an equidigital number, since it uses as much as digits as its factorization.

1911192641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 35.

The square root of 1911192641 is about 43717.1893080971. The cubic root of 1911192641 is about 1240.9896368222.

The spelling of 1911192641 in words is "one billion, nine hundred eleven million, one hundred ninety-two thousand, six hundred forty-one".