1996635475 has 6 divisors (see below), whose sum is σ = 2475828020. Its totient is φ = 1597308360.

The previous prime is 1996635457. The next prime is 1996635479. The reversal of 1996635475 is 5745366991.

It is a de Polignac number, because none of the positive numbers 2^k-1996635475 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1996635479) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39932685 + ... + 39932734.

Almost surely, 2^1996635475 is an apocalyptic number.

1996635475 is a deficient number, since it is larger than the sum of its proper divisors (479192545).

1996635475 is an equidigital number, since it uses as much as digits as its factorization.

1996635475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79865429 (or 79865424 counting only the distinct ones).

The product of its digits is 6123600, while the sum is 55.

The square root of 1996635475 is about 44683.7271833942. The cubic root of 1996635475 is about 1259.2141473696.

The spelling of 1996635475 in words is "one billion, nine hundred ninety-six million, six hundred thirty-five thousand, four hundred seventy-five".