1961981348 has 24 divisors (see below), whose sum is σ = 3572698752. Its totient is φ = 941998304.

The previous prime is 1961981347. The next prime is 1961981377. The reversal of 1961981348 is 8431891691.

It is a junction number, because it is equal to n+sod(n) for n = 1961981296 and 1961981305.

It is not an unprimeable number, because it can be changed into a prime (1961981347) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 88490 + ... + 108417.

It is an arithmetic number, because the mean of its divisors is an integer number (148862448).

Almost surely, 2^1961981348 is an apocalyptic number.

It is an amenable number.

1961981348 is a deficient number, since it is larger than the sum of its proper divisors (1610717404).

1961981348 is a wasteful number, since it uses less digits than its factorization.

1961981348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197011 (or 197009 counting only the distinct ones).

The product of its digits is 373248, while the sum is 50.

The square root of 1961981348 is about 44294.2586347260. The cubic root of 1961981348 is about 1251.8865056847.

The spelling of 1961981348 in words is "one billion, nine hundred sixty-one million, nine hundred eighty-one thousand, three hundred forty-eight".