65402136506 has 32 divisors (see below), whose sum is σ = 113514210432. Its totient is φ = 27681825600.

The previous prime is 65402136479. The next prime is 65402136599. The reversal of 65402136506 is 60563120456.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 65402136506.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 503105 + ... + 619611.

It is an arithmetic number, because the mean of its divisors is an integer number (3547319076).

Almost surely, 2^65402136506 is an apocalyptic number.

65402136506 is a deficient number, since it is larger than the sum of its proper divisors (48112073926).

65402136506 is a wasteful number, since it uses less digits than its factorization.

65402136506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117014.

The product of its (nonzero) digits is 129600, while the sum is 38.

The spelling of 65402136506 in words is "sixty-five billion, four hundred two million, one hundred thirty-six thousand, five hundred six".