1253917505457 has 8 divisors (see below), whose sum is σ = 1857655563680. Its totient is φ = 835945003620.

The previous prime is 1253917505429. The next prime is 1253917505461. The reversal of 1253917505457 is 7545057193521.

It is a happy number.

1253917505457 is a `hidden beast` number, since 1 + 2 + 5 + 3 + 91 + 7 + 5 + 0 + 545 + 7 = 666.

It is not a de Polignac number, because 1253917505457 - 2¹⁶ = 1253917439921 is a prime.

It is a super-2 number, since 2×1253917505457² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1253917505497) 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, 23220694519 + ... + 23220694572.

It is an arithmetic number, because the mean of its divisors is an integer number (232206945460).

Almost surely, 2^{1253917505457} is an apocalyptic number.

It is an amenable number.

1253917505457 is a deficient number, since it is larger than the sum of its proper divisors (603738058223).

1253917505457 is an equidigital number, since it uses as much as digits as its factorization.

1253917505457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46441389100 (or 46441389094 counting only the distinct ones).

The product of its (nonzero) digits is 6615000, while the sum is 54.

The spelling of 1253917505457 in words is "one trillion, two hundred fifty-three billion, nine hundred seventeen million, five hundred five thousand, four hundred fifty-seven".