17963145640 has 32 divisors (see below), whose sum is σ = 44091358560. Its totient is φ = 6532052800.

The previous prime is 17963145631. The next prime is 17963145649. The reversal of 17963145640 is 4654136971.

It is an interprime number because it is at equal distance from previous prime (17963145631) and next prime (17963145649).

It is not an unprimeable number, because it can be changed into a prime (17963145649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20412226 + ... + 20413105.

It is an arithmetic number, because the mean of its divisors is an integer number (1377854955).

Almost surely, 2^17963145640 is an apocalyptic number.

17963145640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

17963145640 is an abundant number, since it is smaller than the sum of its proper divisors (26128212920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

17963145640 is a wasteful number, since it uses less digits than its factorization.

17963145640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40825353 (or 40825349 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 46.

The spelling of 17963145640 in words is "seventeen billion, nine hundred sixty-three million, one hundred forty-five thousand, six hundred forty".