1961730773501 has 16 divisors (see below), whose sum is σ = 2193346589760. Its totient is φ = 1743641383680.

The previous prime is 1961730773491. The next prime is 1961730773531. The reversal of 1961730773501 is 1053770371691.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1961730773501 is a prime.

It is a super-3 number, since 3×1961730773501³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1961730773501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961730773531) 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 15 ways as a sum of consecutive naturals, for example, 9477215 + ... + 9681996.

It is an arithmetic number, because the mean of its divisors is an integer number (137084161860).

Almost surely, 2^{1961730773501} is an apocalyptic number.

It is an amenable number.

1961730773501 is a deficient number, since it is larger than the sum of its proper divisors (231615816259).

1961730773501 is a wasteful number, since it uses less digits than its factorization.

1961730773501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19159564.

The product of its (nonzero) digits is 833490, while the sum is 50.

The spelling of 1961730773501 in words is "one trillion, nine hundred sixty-one billion, seven hundred thirty million, seven hundred seventy-three thousand, five hundred one".