65188196420 has 24 divisors (see below), whose sum is σ = 137940219648. Its totient is φ = 25876229600.

The previous prime is 65188196393. The next prime is 65188196443. The reversal of 65188196420 is 2469188156.

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, 12437876 + ... + 12443115.

It is an arithmetic number, because the mean of its divisors is an integer number (5747509152).

Almost surely, 2^65188196420 is an apocalyptic number.

It is an amenable number.

65188196420 is an abundant number, since it is smaller than the sum of its proper divisors (72752023228).

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

65188196420 is a wasteful number, since it uses less digits than its factorization.

65188196420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24881131 (or 24881129 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 50.

The spelling of 65188196420 in words is "sixty-five billion, one hundred eighty-eight million, one hundred ninety-six thousand, four hundred twenty".