1996672645 has 16 divisors (see below), whose sum is σ = 2698145280. Its totient is φ = 1405281600.

The previous prime is 1996672603. The next prime is 1996672687. The reversal of 1996672645 is 5462766991.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1996672603) and next prime (1996672687).

It is not a de Polignac number, because 1996672645 - 2¹¹ = 1996670597 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 583830 + ... + 587239.

It is an arithmetic number, because the mean of its divisors is an integer number (168634080).

Almost surely, 2^1996672645 is an apocalyptic number.

It is an amenable number.

1996672645 is a deficient number, since it is larger than the sum of its proper divisors (701472635).

1996672645 is a wasteful number, since it uses less digits than its factorization.

1996672645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1171116.

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

The square root of 1996672645 is about 44684.1431046854. The cubic root of 1996672645 is about 1259.2219612979.

The spelling of 1996672645 in words is "one billion, nine hundred ninety-six million, six hundred seventy-two thousand, six hundred forty-five".