65240296605 has 72 divisors (see below), whose sum is σ = 129702553344. Its totient is φ = 30256311360.

The previous prime is 65240296591. The next prime is 65240296673. The reversal of 65240296605 is 50669204256.

It is a happy number.

65240296605 is a `hidden beast` number, since 65 + 240 + 296 + 60 + 5 = 666.

It is not a de Polignac number, because 65240296605 - 2¹¹ = 65240294557 is a prime.

It is a super-2 number, since 2×65240296605² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 135237 + ... + 385706.

It is an arithmetic number, because the mean of its divisors is an integer number (1801424352).

Almost surely, 2^65240296605 is an apocalyptic number.

It is an amenable number.

65240296605 is a deficient number, since it is larger than the sum of its proper divisors (64462256739).

65240296605 is a wasteful number, since it uses less digits than its factorization.

65240296605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520999 (or 520985 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

The spelling of 65240296605 in words is "sixty-five billion, two hundred forty million, two hundred ninety-six thousand, six hundred five".