2619121849 has 12 divisors (see below), whose sum is σ = 2811967396. Its totient is φ = 2437519392.

The previous prime is 2619121807. The next prime is 2619121853. The reversal of 2619121849 is 9481219162.

It can be written as a sum of positive squares in 2 ways, for example, as 1126072249 + 1493049600 = 33557^2 + 38640^2 .

It is not a de Polignac number, because 2619121849 - 2⁷ = 2619121721 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2619121249) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47334 + ... + 86479.

Almost surely, 2^2619121849 is an apocalyptic number.

It is an amenable number.

2619121849 is a deficient number, since it is larger than the sum of its proper divisors (192845547).

2619121849 is a wasteful number, since it uses less digits than its factorization.

2619121849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133896 (or 133873 counting only the distinct ones).

The product of its digits is 62208, while the sum is 43.

The square root of 2619121849 is about 51177.3567996629. The cubic root of 2619121849 is about 1378.4316441809.

The spelling of 2619121849 in words is "two billion, six hundred nineteen million, one hundred twenty-one thousand, eight hundred forty-nine".