1961074657 has 8 divisors (see below), whose sum is σ = 1993161600. Its totient is φ = 1929070704.

The previous prime is 1961074639. The next prime is 1961074667. The reversal of 1961074657 is 7564701691.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1961074657 - 2⁷ = 1961074529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1961074667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27819 + ... + 68527.

It is an arithmetic number, because the mean of its divisors is an integer number (249145200).

Almost surely, 2^1961074657 is an apocalyptic number.

It is an amenable number.

1961074657 is a deficient number, since it is larger than the sum of its proper divisors (32086943).

1961074657 is an equidigital number, since it uses as much as digits as its factorization.

1961074657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41495.

The product of its (nonzero) digits is 317520, while the sum is 46.

The square root of 1961074657 is about 44284.0225928043. The cubic root of 1961074657 is about 1251.6936310813.

The spelling of 1961074657 in words is "one billion, nine hundred sixty-one million, seventy-four thousand, six hundred fifty-seven".