1968461956 has 12 divisors (see below), whose sum is σ = 3476412940. Its totient is φ = 975201120.

The previous prime is 1968461939. The next prime is 1968461981. The reversal of 1968461956 is 6591648691.

It can be written as a sum of positive squares in 2 ways, for example, as 1300756356 + 667705600 = 36066^2 + 25840^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1968461897 and 1968461906.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2256975 + ... + 2257846.

Almost surely, 2^1968461956 is an apocalyptic number.

It is an amenable number.

1968461956 is a deficient number, since it is larger than the sum of its proper divisors (1507950984).

1968461956 is a wasteful number, since it uses less digits than its factorization.

1968461956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4514934 (or 4514932 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 55.

The square root of 1968461956 is about 44367.3523663515. The cubic root of 1968461956 is about 1253.2633569339.

It can be divided in two parts, 19684619 and 56, that added together give a triangular number (19684675 = T₆₂₇₄).

The spelling of 1968461956 in words is "one billion, nine hundred sixty-eight million, four hundred sixty-one thousand, nine hundred fifty-six".