7645665722136 has 64 divisors (see below), whose sum is σ = 20628563155200. Its totient is φ = 2347474985088.

The previous prime is 7645665722129. The next prime is 7645665722137. The reversal of 7645665722136 is 6312275665467.

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 7645665722136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7645665722137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26091276 + ... + 26382683.

It is an arithmetic number, because the mean of its divisors is an integer number (322321299300).

Almost surely, 2^{7645665722136} is an apocalyptic number.

It is an amenable number.

7645665722136 is an abundant number, since it is smaller than the sum of its proper divisors (12982897433064).

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

7645665722136 is a wasteful number, since it uses less digits than its factorization.

7645665722136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52474448 (or 52474444 counting only the distinct ones).

The product of its digits is 76204800, while the sum is 60.

The spelling of 7645665722136 in words is "seven trillion, six hundred forty-five billion, six hundred sixty-five million, seven hundred twenty-two thousand, one hundred thirty-six".