1968986554 has 8 divisors (see below), whose sum is σ = 2955306708. Its totient is φ = 983884320.

The previous prime is 1968986521. The next prime is 1968986603. The reversal of 1968986554 is 4556898691.

It can be written as a sum of positive squares in 2 ways, for example, as 1967366025 + 1620529 = 44355^2 + 1273^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1968986492 and 1968986501.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300427 + ... + 306910.

Almost surely, 2^1968986554 is an apocalyptic number.

1968986554 is a deficient number, since it is larger than the sum of its proper divisors (986320154).

1968986554 is a wasteful number, since it uses less digits than its factorization.

1968986554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608960.

The product of its digits is 18662400, while the sum is 61.

The square root of 1968986554 is about 44373.2639547735. The cubic root of 1968986554 is about 1253.3746792199.

The spelling of 1968986554 in words is "one billion, nine hundred sixty-eight million, nine hundred eighty-six thousand, five hundred fifty-four".