1961373351 has 48 divisors (see below), whose sum is σ = 3188634624. Its totient is φ = 1050302976.

The previous prime is 1961373331. The next prime is 1961373361. The reversal of 1961373351 is 1533731691.

It is not a de Polignac number, because 1961373351 - 2¹⁰ = 1961372327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961373301) 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 47 ways as a sum of consecutive naturals, for example, 1777666 + ... + 1778768.

It is an arithmetic number, because the mean of its divisors is an integer number (66429888).

Almost surely, 2^1961373351 is an apocalyptic number.

1961373351 is a deficient number, since it is larger than the sum of its proper divisors (1227261273).

1961373351 is a wasteful number, since it uses less digits than its factorization.

1961373351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1440 (or 1423 counting only the distinct ones).

The product of its digits is 51030, while the sum is 39.

The square root of 1961373351 is about 44287.3949448373. The cubic root of 1961373351 is about 1251.7571769193.

The spelling of 1961373351 in words is "one billion, nine hundred sixty-one million, three hundred seventy-three thousand, three hundred fifty-one".