19479363525440 has 224 divisors, whose sum is σ = 58417186248960. Its totient is φ = 6021527371776.

The previous prime is 19479363525431. The next prime is 19479363525449. The reversal of 19479363525440 is 4452536397491.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (19479363525431) and next prime (19479363525449).

It is a tau number, because it is divible by the number of its divisors (224).

It is a hoax number, since the sum of its digits (62) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19479363525449) 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, 6526145 + ... + 9030464.

It is an arithmetic number, because the mean of its divisors is an integer number (260791010040).

Almost surely, 2^{19479363525440} is an apocalyptic number.

19479363525440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19479363525440 is an abundant number, since it is smaller than the sum of its proper divisors (38937822723520).

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

19479363525440 is a wasteful number, since it uses less digits than its factorization.

19479363525440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15556689 (or 15556679 counting only the distinct ones).

The product of its (nonzero) digits is 97977600, while the sum is 62.

The spelling of 19479363525440 in words is "nineteen trillion, four hundred seventy-nine billion, three hundred sixty-three million, five hundred twenty-five thousand, four hundred forty".