126435642650 has 24 divisors (see below), whose sum is σ = 235181063520. Its totient is φ = 50571941360.

The previous prime is 126435642643. The next prime is 126435642653. The reversal of 126435642650 is 56246534621.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (126435642653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1417061 + ... + 1503639.

It is an arithmetic number, because the mean of its divisors is an integer number (9799210980).

Almost surely, 2^126435642650 is an apocalyptic number.

126435642650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

126435642650 is a deficient number, since it is larger than the sum of its proper divisors (108745420870).

126435642650 is a wasteful number, since it uses less digits than its factorization.

126435642650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115798 (or 115793 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 44.

The spelling of 126435642650 in words is "one hundred twenty-six billion, four hundred thirty-five million, six hundred forty-two thousand, six hundred fifty".