1961814458 has 8 divisors (see below), whose sum is σ = 2944953300. Its totient is φ = 980163360.

The previous prime is 1961814457. The next prime is 1961814493. The reversal of 1961814458 is 8544181691.

It can be written as a sum of positive squares in 2 ways, for example, as 1438457329 + 523357129 = 37927^2 + 22877^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1961814457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 368633 + ... + 373916.

Almost surely, 2^1961814458 is an apocalyptic number.

1961814458 is a deficient number, since it is larger than the sum of its proper divisors (983138842).

1961814458 is a wasteful number, since it uses less digits than its factorization.

1961814458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743872.

The product of its digits is 276480, while the sum is 47.

The square root of 1961814458 is about 44292.3747161969. The cubic root of 1961814458 is about 1251.8510087005.

The spelling of 1961814458 in words is "one billion, nine hundred sixty-one million, eight hundred fourteen thousand, four hundred fifty-eight".