1961554982 has 4 divisors (see below), whose sum is σ = 2942332476. Its totient is φ = 980777490.

The previous prime is 1961554961. The next prime is 1961554993. The reversal of 1961554982 is 2894551691.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1961554982.

It is a congruent number.

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, 490388744 + ... + 490388747.

It is an arithmetic number, because the mean of its divisors is an integer number (735583119).

Almost surely, 2^1961554982 is an apocalyptic number.

1961554982 is a deficient number, since it is larger than the sum of its proper divisors (980777494).

1961554982 is an equidigital number, since it uses as much as digits as its factorization.

1961554982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980777493.

The product of its digits is 777600, while the sum is 50.

The square root of 1961554982 is about 44289.4454921260. The cubic root of 1961554982 is about 1251.7958149634.

The spelling of 1961554982 in words is "one billion, nine hundred sixty-one million, five hundred fifty-four thousand, nine hundred eighty-two".