1961142072108 has 24 divisors (see below), whose sum is σ = 4576021240560. Its totient is φ = 653710728000.

The previous prime is 1961142072107. The next prime is 1961142072121. The reversal of 1961142072108 is 8012702411691.

It is a self number, because there is not a number n which added to its sum of digits gives 1961142072108.

It is not an unprimeable number, because it can be changed into a prime (1961142072107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3744358 + ... + 4235858.

It is an arithmetic number, because the mean of its divisors is an integer number (190667551690).

Almost surely, 2^{1961142072108} is an apocalyptic number.

It is an amenable number.

1961142072108 is an abundant number, since it is smaller than the sum of its proper divisors (2614879168452).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1961142072108 is a wasteful number, since it uses less digits than its factorization.

1961142072108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824017 (or 824015 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 42.

Adding to 1961142072108 its reverse (8012702411691), we get a palindrome (9973844483799).

The spelling of 1961142072108 in words is "one trillion, nine hundred sixty-one billion, one hundred forty-two million, seventy-two thousand, one hundred eight".