1253739645550 has 24 divisors (see below), whose sum is σ = 2665092275856. Its totient is φ = 429853592640.

The previous prime is 1253739645503. The next prime is 1253739645569. The reversal of 1253739645550 is 555469373521.

It is a junction number, because it is equal to n+sod(n) for n = 1253739645491 and 1253739645500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1791056287 + ... + 1791056986.

It is an arithmetic number, because the mean of its divisors is an integer number (111045511494).

Almost surely, 2^{1253739645550} is an apocalyptic number.

1253739645550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1253739645550 is an abundant number, since it is smaller than the sum of its proper divisors (1411352630306).

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

1253739645550 is a wasteful number, since it uses less digits than its factorization.

1253739645550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3582113292 (or 3582113287 counting only the distinct ones).

The product of its (nonzero) digits is 17010000, while the sum is 55.

The spelling of 1253739645550 in words is "one trillion, two hundred fifty-three billion, seven hundred thirty-nine million, six hundred forty-five thousand, five hundred fifty".