1961095779 has 24 divisors (see below), whose sum is σ = 2939768832. Its totient is φ = 1306436040.

The previous prime is 1961095777. The next prime is 1961095819. The reversal of 1961095779 is 9775901691.

It is a happy number.

1961095779 is a `hidden beast` number, since 1 + 9 + 61 + 0 + 9 + 577 + 9 = 666.

It is not a de Polignac number, because 1961095779 - 2¹ = 1961095777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1961095777) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 511062 + ... + 514884.

It is an arithmetic number, because the mean of its divisors is an integer number (122490368).

Almost surely, 2^1961095779 is an apocalyptic number.

1961095779 is a deficient number, since it is larger than the sum of its proper divisors (978673053).

1961095779 is an equidigital number, since it uses as much as digits as its factorization.

1961095779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5949 (or 5937 counting only the distinct ones).

The product of its (nonzero) digits is 1071630, while the sum is 54.

The square root of 1961095779 is about 44284.2610754656. The cubic root of 1961095779 is about 1251.6981249061.

The spelling of 1961095779 in words is "one billion, nine hundred sixty-one million, ninety-five thousand, seven hundred seventy-nine".