1253541552261 has 8 divisors (see below), whose sum is σ = 1671394701600. Its totient is φ = 835691385552.

The previous prime is 1253541552247. The next prime is 1253541552317. The reversal of 1253541552261 is 1622551453521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1253541552261 - 2²¹ = 1253539455109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1253541552961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 563215 + ... + 1680563.

It is an arithmetic number, because the mean of its divisors is an integer number (208924337700).

Almost surely, 2^{1253541552261} is an apocalyptic number.

It is an amenable number.

1253541552261 is a deficient number, since it is larger than the sum of its proper divisors (417853149339).

1253541552261 is a wasteful number, since it uses less digits than its factorization.

1253541552261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1491315.

The product of its digits is 360000, while the sum is 42.

The spelling of 1253541552261 in words is "one trillion, two hundred fifty-three billion, five hundred forty-one million, five hundred fifty-two thousand, two hundred sixty-one".