1961307499311 has 12 divisors (see below), whose sum is σ = 2937925637192. Its totient is φ = 1307538332712.

The previous prime is 1961307499297. The next prime is 1961307499321. The reversal of 1961307499311 is 1139947031691.

1961307499311 is a `hidden beast` number, since 1 + 9 + 6 + 130 + 7 + 499 + 3 + 11 = 666.

It is not a de Polignac number, because 1961307499311 - 2⁵ = 1961307499279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961307499321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4035611896 + ... + 4035612381.

Almost surely, 2^{1961307499311} is an apocalyptic number.

1961307499311 is a deficient number, since it is larger than the sum of its proper divisors (976618137881).

1961307499311 is an frugal number, since it uses more digits than its factorization.

1961307499311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8071224292 (or 8071224280 counting only the distinct ones).

The product of its (nonzero) digits is 1102248, while the sum is 54.

The spelling of 1961307499311 in words is "one trillion, nine hundred sixty-one billion, three hundred seven million, four hundred ninety-nine thousand, three hundred eleven".