1949545658 has 4 divisors (see below), whose sum is σ = 2924318490. Its totient is φ = 974772828.

The previous prime is 1949545621. The next prime is 1949545679. The reversal of 1949545658 is 8565459491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8565459491 = 179 ⋅47851729.

It can be written as a sum of positive squares in only one way, i.e., 1768454809 + 181090849 = 42053^2 + 13457^2 .

It is an unprimeable number.

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, 487386413 + ... + 487386416.

Almost surely, 2^1949545658 is an apocalyptic number.

1949545658 is a deficient number, since it is larger than the sum of its proper divisors (974772832).

1949545658 is an equidigital number, since it uses as much as digits as its factorization.

1949545658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 974772831.

The product of its digits is 7776000, while the sum is 56.

The square root of 1949545658 is about 44153.6596218252. The cubic root of 1949545658 is about 1249.2359401051.

The spelling of 1949545658 in words is "one billion, nine hundred forty-nine million, five hundred forty-five thousand, six hundred fifty-eight".