1909777964 has 12 divisors (see below), whose sum is σ = 3342544800. Its totient is φ = 954765168.

The previous prime is 1909777957. The next prime is 1909777979. The reversal of 1909777964 is 4697779091.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9677 + ... + 62555.

It is an arithmetic number, because the mean of its divisors is an integer number (278545400).

Almost surely, 2^1909777964 is an apocalyptic number.

It is an amenable number.

1909777964 is a deficient number, since it is larger than the sum of its proper divisors (1432766836).

1909777964 is a wasteful number, since it uses less digits than its factorization.

1909777964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61912 (or 61910 counting only the distinct ones).

The product of its (nonzero) digits is 6001128, while the sum is 59.

The square root of 1909777964 is about 43701.0064414997. The cubic root of 1909777964 is about 1240.6833650898.

The spelling of 1909777964 in words is "one billion, nine hundred nine million, seven hundred seventy-seven thousand, nine hundred sixty-four".