1965769642 has 16 divisors (see below), whose sum is σ = 3031356672. Its totient is φ = 955594800.

The previous prime is 1965769609. The next prime is 1965769643. The reversal of 1965769642 is 2469675691.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1965769643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55053 + ... + 83440.

It is an arithmetic number, because the mean of its divisors is an integer number (189459792).

Almost surely, 2^1965769642 is an apocalyptic number.

1965769642 is a deficient number, since it is larger than the sum of its proper divisors (1065587030).

1965769642 is a wasteful number, since it uses less digits than its factorization.

1965769642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138693.

The product of its digits is 4898880, while the sum is 55.

The square root of 1965769642 is about 44337.0008232402. Note that the first 3 decimals coincide. The cubic root of 1965769642 is about 1252.6917231672.

The spelling of 1965769642 in words is "one billion, nine hundred sixty-five million, seven hundred sixty-nine thousand, six hundred forty-two".