136644122420650 has 48 divisors (see below), whose sum is σ = 273860666592408. Its totient is φ = 50425200000000.

The previous prime is 136644122420579. The next prime is 136644122420653. The reversal of 136644122420650 is 56024221446631.

It can be written as a sum of positive squares in 12 ways, for example, as 15242223248641 + 121401899172009 = 3904129^2 + 11018253^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 136644122420650.

It is not an unprimeable number, because it can be changed into a prime (136644122420653) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57191851 + ... + 59533150.

Almost surely, 2^{136644122420650} is an apocalyptic number.

136644122420650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

136644122420650 is an abundant number, since it is smaller than the sum of its proper divisors (137216544171758).

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

136644122420650 is a wasteful number, since it uses less digits than its factorization.

136644122420650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116726827 (or 116726822 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 46.

The spelling of 136644122420650 in words is "one hundred thirty-six trillion, six hundred forty-four billion, one hundred twenty-two million, four hundred twenty thousand, six hundred fifty".