19651565148 has 24 divisors (see below), whose sum is σ = 47847289728. Its totient is φ = 6265716336.

The previous prime is 19651565117. The next prime is 19651565159. The reversal of 19651565148 is 84156515691.

It is a self number, because there is not a number n which added to its sum of digits gives 19651565148.

It is a congruent number.

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, 35600386 + ... + 35600937.

It is an arithmetic number, because the mean of its divisors is an integer number (1993637072).

Almost surely, 2^19651565148 is an apocalyptic number.

It is an amenable number.

19651565148 is an abundant number, since it is smaller than the sum of its proper divisors (28195724580).

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

19651565148 is a wasteful number, since it uses less digits than its factorization.

19651565148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71201353 (or 71201351 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 51.

The spelling of 19651565148 in words is "nineteen billion, six hundred fifty-one million, five hundred sixty-five thousand, one hundred forty-eight".