65514891377 has 4 divisors (see below), whose sum is σ = 70554498420. Its totient is φ = 60475284336.

The previous prime is 65514891359. The next prime is 65514891433. The reversal of 65514891377 is 77319841556.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37948598416 + 27566292961 = 194804^2 + 166031^2 .

It is a cyclic number.

It is not a de Polignac number, because 65514891377 - 2⁶ = 65514891313 is a prime.

It is a super-2 number, since 2×65514891377² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65514891077) 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, 2519803502 + ... + 2519803527.

It is an arithmetic number, because the mean of its divisors is an integer number (17638624605).

Almost surely, 2^65514891377 is an apocalyptic number.

It is an amenable number.

65514891377 is a deficient number, since it is larger than the sum of its proper divisors (5039607043).

65514891377 is a wasteful number, since it uses less digits than its factorization.

65514891377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5039607042.

The product of its digits is 6350400, while the sum is 56.

The spelling of 65514891377 in words is "sixty-five billion, five hundred fourteen million, eight hundred ninety-one thousand, three hundred seventy-seven".