1949218503458 has 18 divisors (see below), whose sum is σ = 2937440223921. Its totient is φ = 970092706504.

The previous prime is 1949218503457. The next prime is 1949218503481. The reversal of 1949218503458 is 8543058129491.

It can be written as a sum of positive squares in 2 ways, for example, as 1263099511129 + 686118992329 = 1123877^2 + 828323^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=987223.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1949218503397 and 1949218503406.

It is not an unprimeable number, because it can be changed into a prime (1949218503457) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 448197068 + ... + 448201416.

Almost surely, 2^{1949218503458} is an apocalyptic number.

1949218503458 is a deficient number, since it is larger than the sum of its proper divisors (988221720463).

1949218503458 is an frugal number, since it uses more digits than its factorization.

1949218503458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9154 (or 4578 counting only the distinct ones).

The product of its (nonzero) digits is 12441600, while the sum is 59.

The spelling of 1949218503458 in words is "one trillion, nine hundred forty-nine billion, two hundred eighteen million, five hundred three thousand, four hundred fifty-eight".