1252353161640 has 64 divisors (see below), whose sum is σ = 4293782271360. Its totient is φ = 286252151040.

The previous prime is 1252353161617. The next prime is 1252353161641. The reversal of 1252353161640 is 461613532521.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1252353161641) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 745447471 + ... + 745449150.

It is an arithmetic number, because the mean of its divisors is an integer number (67090347990).

Almost surely, 2^{1252353161640} is an apocalyptic number.

1252353161640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1252353161640 is an abundant number, since it is smaller than the sum of its proper divisors (3041429109720).

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

1252353161640 is a wasteful number, since it uses less digits than its factorization.

1252353161640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1490896642 (or 1490896638 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 1252353161640 in words is "one trillion, two hundred fifty-two billion, three hundred fifty-three million, one hundred sixty-one thousand, six hundred forty".