1965777912 has 96 divisors (see below), whose sum is σ = 6091768800. Its totient is φ = 560984832.

The previous prime is 1965777901. The next prime is 1965777929. The reversal of 1965777912 is 2197775691.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 557178 + ... + 560694.

It is an arithmetic number, because the mean of its divisors is an integer number (63455925).

Almost surely, 2^1965777912 is an apocalyptic number.

1965777912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1965777912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3045884400).

1965777912 is an abundant number, since it is smaller than the sum of its proper divisors (4125990888).

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

1965777912 is a wasteful number, since it uses less digits than its factorization.

1965777912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4645 (or 4638 counting only the distinct ones).

The product of its digits is 1666980, while the sum is 54.

The square root of 1965777912 is about 44337.0940861036. The cubic root of 1965777912 is about 1252.6934798576.

The spelling of 1965777912 in words is "one billion, nine hundred sixty-five million, seven hundred seventy-seven thousand, nine hundred twelve".