1648767473 has 4 divisors (see below), whose sum is σ = 1683847680. Its totient is φ = 1613687268.

The previous prime is 1648767431. The next prime is 1648767493. The reversal of 1648767473 is 3747678461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3747678461 = 27689 ⋅135349.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1648767473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1648767413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17540033 + ... + 17540126.

It is an arithmetic number, because the mean of its divisors is an integer number (420961920).

Almost surely, 2^1648767473 is an apocalyptic number.

It is an amenable number.

1648767473 is a deficient number, since it is larger than the sum of its proper divisors (35080207).

1648767473 is an equidigital number, since it uses as much as digits as its factorization.

1648767473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35080206.

The product of its digits is 4741632, while the sum is 53.

The square root of 1648767473 is about 40605.0178303125. The cubic root of 1648767473 is about 1181.3714478941.

The spelling of 1648767473 in words is "one billion, six hundred forty-eight million, seven hundred sixty-seven thousand, four hundred seventy-three".