1251449669208 has 192 divisors, whose sum is σ = 3433610603520. Its totient is φ = 379624089600.

The previous prime is 1251449669149. The next prime is 1251449669227. The reversal of 1251449669208 is 8029669441521.

It is a happy number.

It is a super-2 number, since 2×1251449669208² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 415624423 + ... + 415627433.

It is an arithmetic number, because the mean of its divisors is an integer number (17883388560).

Almost surely, 2^{1251449669208} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1251449669208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1716805301760).

1251449669208 is an abundant number, since it is smaller than the sum of its proper divisors (2182160934312).

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

1251449669208 is a wasteful number, since it uses less digits than its factorization.

1251449669208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5018 (or 4997 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 57.

The spelling of 1251449669208 in words is "one trillion, two hundred fifty-one billion, four hundred forty-nine million, six hundred sixty-nine thousand, two hundred eight".