2619121853 has 2 divisors, whose sum is σ = 2619121854. Its totient is φ = 2619121852.

The previous prime is 2619121807. The next prime is 2619121871. The reversal of 2619121853 is 3581219162.

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., 1933624729 + 685497124 = 43973^2 + 26182^2 .

It is a cyclic number.

It is not a de Polignac number, because 2619121853 - 2¹⁶ = 2619056317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2619121753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1309560926 + 1309560927.

It is an arithmetic number, because the mean of its divisors is an integer number (1309560927).

Almost surely, 2^2619121853 is an apocalyptic number.

It is an amenable number.

2619121853 is a deficient number, since it is larger than the sum of its proper divisors (1).

2619121853 is an equidigital number, since it uses as much as digits as its factorization.

2619121853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 38.

The square root of 2619121853 is about 51177.3568387427. The cubic root of 2619121853 is about 1378.4316448826.

The spelling of 2619121853 in words is "two billion, six hundred nineteen million, one hundred twenty-one thousand, eight hundred fifty-three".