1663961548 has 24 divisors (see below), whose sum is σ = 2984829120. Its totient is φ = 811178880.

The previous prime is 1663961531. The next prime is 1663961569. The reversal of 1663961548 is 8451693661.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 509890 + ... + 513142.

It is an arithmetic number, because the mean of its divisors is an integer number (124367880).

Almost surely, 2^1663961548 is an apocalyptic number.

It is an amenable number.

1663961548 is a deficient number, since it is larger than the sum of its proper divisors (1320867572).

1663961548 is a wasteful number, since it uses less digits than its factorization.

1663961548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6417 (or 6415 counting only the distinct ones).

The product of its digits is 933120, while the sum is 49.

The square root of 1663961548 is about 40791.6847899177. The cubic root of 1663961548 is about 1184.9892995764.

It can be divided in two parts, 16639 and 61548, that added together give a palindrome (78187).

The spelling of 1663961548 in words is "one billion, six hundred sixty-three million, nine hundred sixty-one thousand, five hundred forty-eight".