1209206452650 has 48 divisors (see below), whose sum is σ = 3427236577344. Its totient is φ = 276390046080.

The previous prime is 1209206452637. The next prime is 1209206452673. The reversal of 1209206452650 is 562546029021.

It is a super-3 number, since 3×1209206452650³ (a number of 37 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 575811547 + ... + 575813646.

It is an arithmetic number, because the mean of its divisors is an integer number (71400762028).

Almost surely, 2^{1209206452650} is an apocalyptic number.

1209206452650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1209206452650 is an abundant number, since it is smaller than the sum of its proper divisors (2218030124694).

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

1209206452650 is a wasteful number, since it uses less digits than its factorization.

1209206452650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151625215 (or 1151625210 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 42.

The spelling of 1209206452650 in words is "one trillion, two hundred nine billion, two hundred six million, four hundred fifty-two thousand, six hundred fifty".