1219420450649 has 8 divisors (see below), whose sum is σ = 1306828968000. Its totient is φ = 1134877786416.

The previous prime is 1219420450627. The next prime is 1219420450669. The reversal of 1219420450649 is 9460540249121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1219420450649 - 2¹² = 1219420446553 is a prime.

It is a super-2 number, since 2×1219420450649² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1219420450609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 716462399 + ... + 716464100.

It is an arithmetic number, because the mean of its divisors is an integer number (163353621000).

Almost surely, 2^{1219420450649} is an apocalyptic number.

It is an amenable number.

1219420450649 is a deficient number, since it is larger than the sum of its proper divisors (87408517351).

1219420450649 is a wasteful number, since it uses less digits than its factorization.

1219420450649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1432926559.

The product of its (nonzero) digits is 622080, while the sum is 47.

The spelling of 1219420450649 in words is "one trillion, two hundred nineteen billion, four hundred twenty million, four hundred fifty thousand, six hundred forty-nine".