65777793311280 has 40 divisors (see below), whose sum is σ = 203911159265712. Its totient is φ = 17540744882944.

The previous prime is 65777793311261. The next prime is 65777793311287. The reversal of 65777793311280 is 8211339777756.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (65777793311287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137037069159 + ... + 137037069638.

Almost surely, 2^{65777793311280} is an apocalyptic number.

65777793311280 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65777793311280 is an abundant number, since it is smaller than the sum of its proper divisors (138133365954432).

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

65777793311280 is a wasteful number, since it uses less digits than its factorization.

65777793311280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274074138813 (or 274074138807 counting only the distinct ones).

The product of its (nonzero) digits is 93350880, while the sum is 66.

The spelling of 65777793311280 in words is "sixty-five trillion, seven hundred seventy-seven billion, seven hundred ninety-three million, three hundred eleven thousand, two hundred eighty".