1961043774 has 16 divisors (see below), whose sum is σ = 3922566912. Its totient is φ = 653601368.

The previous prime is 1961043769. The next prime is 1961043793. The reversal of 1961043774 is 4773401691.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54667 + ... + 83129.

It is an arithmetic number, because the mean of its divisors is an integer number (245160432).

Almost surely, 2^1961043774 is an apocalyptic number.

1961043774 is an abundant number, since it is smaller than the sum of its proper divisors (1961523138).

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

1961043774 is a wasteful number, since it uses less digits than its factorization.

1961043774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39951.

The product of its (nonzero) digits is 127008, while the sum is 42.

The square root of 1961043774 is about 44283.6738990793. The cubic root of 1961043774 is about 1251.6870604905.

The spelling of 1961043774 in words is "one billion, nine hundred sixty-one million, forty-three thousand, seven hundred seventy-four".