19625668488 has 24 divisors (see below), whose sum is σ = 53152852350. Its totient is φ = 6541889472.

The previous prime is 19625668483. The next prime is 19625668507. The reversal of 19625668488 is 88486652691.

19625668488 is a `hidden beast` number, since 1 + 9 + 62 + 566 + 8 + 4 + 8 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 14482196964 + 5143471524 = 120342^2 + 71718^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×19625668488² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19625668483) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 136289293 + ... + 136289436.

Almost surely, 2^19625668488 is an apocalyptic number.

19625668488 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

19625668488 is an abundant number, since it is smaller than the sum of its proper divisors (33527183862).

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

19625668488 is a wasteful number, since it uses less digits than its factorization.

19625668488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272578741 (or 272578734 counting only the distinct ones).

The product of its digits is 39813120, while the sum is 63.

The spelling of 19625668488 in words is "nineteen billion, six hundred twenty-five million, six hundred sixty-eight thousand, four hundred eighty-eight".