1961519686072 has 32 divisors (see below), whose sum is σ = 3730134952800. Its totient is φ = 966820624000.

The previous prime is 1961519686051. The next prime is 1961519686153. The reversal of 1961519686072 is 2706869151691.

It is a self number, because there is not a number n which added to its sum of digits gives 1961519686072.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4226322 + ... + 4667422.

It is an arithmetic number, because the mean of its divisors is an integer number (116566717275).

Almost surely, 2^{1961519686072} is an apocalyptic number.

It is an amenable number.

1961519686072 is a deficient number, since it is larger than the sum of its proper divisors (1768615266728).

1961519686072 is a wasteful number, since it uses less digits than its factorization.

1961519686072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449007 (or 449003 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 61.

The spelling of 1961519686072 in words is "one trillion, nine hundred sixty-one billion, five hundred nineteen million, six hundred eighty-six thousand, seventy-two".