65765167540 has 12 divisors (see below), whose sum is σ = 138106851876. Its totient is φ = 26306067008.

The previous prime is 65765167537. The next prime is 65765167541. The reversal of 65765167540 is 4576156756.

It can be written as a sum of positive squares in 2 ways, for example, as 20124827044 + 45640340496 = 141862^2 + 213636^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65765167541) 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, 1644129169 + ... + 1644129208.

It is an arithmetic number, because the mean of its divisors is an integer number (11508904323).

Almost surely, 2^65765167540 is an apocalyptic number.

It is an amenable number.

65765167540 is an abundant number, since it is smaller than the sum of its proper divisors (72341684336).

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

65765167540 is a wasteful number, since it uses less digits than its factorization.

65765167540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3288258386 (or 3288258384 counting only the distinct ones).

The product of its (nonzero) digits is 5292000, while the sum is 52.

The spelling of 65765167540 in words is "sixty-five billion, seven hundred sixty-five million, one hundred sixty-seven thousand, five hundred forty".