65641197280 has 24 divisors (see below), whose sum is σ = 155077328952. Its totient is φ = 26256478848.

The previous prime is 65641197257. The next prime is 65641197289. The reversal of 65641197280 is 8279114656.

It is a happy number.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65641197289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205128582 + ... + 205128901.

It is an arithmetic number, because the mean of its divisors is an integer number (6461555373).

Almost surely, 2^65641197280 is an apocalyptic number.

It is an amenable number.

65641197280 is an abundant number, since it is smaller than the sum of its proper divisors (89436131672).

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

65641197280 is a wasteful number, since it uses less digits than its factorization.

65641197280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410257498 (or 410257490 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 65641197280 in words is "sixty-five billion, six hundred forty-one million, one hundred ninety-seven thousand, two hundred eighty".