1961730773500 has 48 divisors (see below), whose sum is σ = 4291950368160. Its totient is φ = 783313123200.

The previous prime is 1961730773491. The next prime is 1961730773531. The reversal of 1961730773500 is 53770371691.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3163182 + ... + 3732181.

It is an arithmetic number, because the mean of its divisors is an integer number (89415632670).

Almost surely, 2^{1961730773500} is an apocalyptic number.

1961730773500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1961730773500 is an abundant number, since it is smaller than the sum of its proper divisors (2330219594660).

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

1961730773500 is a wasteful number, since it uses less digits than its factorization.

1961730773500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6895951 (or 6895939 counting only the distinct ones).

The product of its (nonzero) digits is 833490, while the sum is 49.

The spelling of 1961730773500 in words is "one trillion, nine hundred sixty-one billion, seven hundred thirty million, seven hundred seventy-three thousand, five hundred".