1648136893 has 32 divisors (see below), whose sum is σ = 2002492800. Its totient is φ = 1339877376.

The previous prime is 1648136881. The next prime is 1648136909. The reversal of 1648136893 is 3986318461.

It is a cyclic number.

It is not a de Polignac number, because 1648136893 - 2²¹ = 1646039741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1648136803) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 346153 + ... + 350881.

It is an arithmetic number, because the mean of its divisors is an integer number (62577900).

Almost surely, 2^1648136893 is an apocalyptic number.

1648136893 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1648136893 is a deficient number, since it is larger than the sum of its proper divisors (354355907).

1648136893 is a wasteful number, since it uses less digits than its factorization.

1648136893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4861.

The product of its digits is 746496, while the sum is 49.

The square root of 1648136893 is about 40597.2522838677. The cubic root of 1648136893 is about 1181.2208213988.

The spelling of 1648136893 in words is "one billion, six hundred forty-eight million, one hundred thirty-six thousand, eight hundred ninety-three".