1253903242165 has 36 divisors (see below), whose sum is σ = 1853414948268. Its totient is φ = 809195116800.

The previous prime is 1253903242127. The next prime is 1253903242211. The reversal of 1253903242165 is 5612423093521.

It can be written as a sum of positive squares in 2 ways, for example, as 722838339601 + 531064902564 = 850199^2 + 728742^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1253903242165 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 72258240 + ... + 72275590.

It is an arithmetic number, because the mean of its divisors is an integer number (51483748563).

Almost surely, 2^{1253903242165} is an apocalyptic number.

It is an amenable number.

1253903242165 is a deficient number, since it is larger than the sum of its proper divisors (599511706103).

1253903242165 is an frugal number, since it uses more digits than its factorization.

1253903242165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34738 (or 17380 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 1253903242165 in words is "one trillion, two hundred fifty-three billion, nine hundred three million, two hundred forty-two thousand, one hundred sixty-five".