2519379661 has 2 divisors, whose sum is σ = 2519379662. Its totient is φ = 2519379660.

The previous prime is 2519379649. The next prime is 2519379673. The reversal of 2519379661 is 1669739152.

It is a balanced prime because it is at equal distance from previous prime (2519379649) and next prime (2519379673).

It can be written as a sum of positive squares in only one way, i.e., 1764504036 + 754875625 = 42006^2 + 27475^2 .

It is a cyclic number.

It is not a de Polignac number, because 2519379661 - 2¹³ = 2519371469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2519379631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1259689830 + 1259689831.

It is an arithmetic number, because the mean of its divisors is an integer number (1259689831).

Almost surely, 2^2519379661 is an apocalyptic number.

It is an amenable number.

2519379661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2519379661 is an equidigital number, since it uses as much as digits as its factorization.

2519379661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 612360, while the sum is 49.

The square root of 2519379661 is about 50193.4224874136. The cubic root of 2519379661 is about 1360.7067514952.

The spelling of 2519379661 in words is "two billion, five hundred nineteen million, three hundred seventy-nine thousand, six hundred sixty-one".