1209199629690 has 160 divisors (see below), whose sum is σ = 3535509833856. Its totient is φ = 294759077760.

The previous prime is 1209199629683. The next prime is 1209199629691. The reversal of 1209199629690 is 969269919021.

It is a happy number.

It is a super-2 number, since 2×1209199629690² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1209199629691) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 527145 + ... + 1642035.

Almost surely, 2^{1209199629690} is an apocalyptic number.

1209199629690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1209199629690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1767754916928).

1209199629690 is an abundant number, since it is smaller than the sum of its proper divisors (2326310204166).

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

1209199629690 is a wasteful number, since it uses less digits than its factorization.

1209199629690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115026 (or 1115017 counting only the distinct ones).

The product of its (nonzero) digits is 8503056, while the sum is 63.

The spelling of 1209199629690 in words is "one trillion, two hundred nine billion, one hundred ninety-nine million, six hundred twenty-nine thousand, six hundred ninety".