1253548453520 has 40 divisors (see below), whose sum is σ = 3179454716160. Its totient is φ = 455835800960.

The previous prime is 1253548453519. The next prime is 1253548453523. The reversal of 1253548453520 is 253548453521.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (1253548453523) 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, 712242560 + ... + 712244319.

It is an arithmetic number, because the mean of its divisors is an integer number (79486367904).

Almost surely, 2^{1253548453520} is an apocalyptic number.

1253548453520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1253548453520 is an abundant number, since it is smaller than the sum of its proper divisors (1925906262640).

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

1253548453520 is a wasteful number, since it uses less digits than its factorization.

1253548453520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1424486903 (or 1424486897 counting only the distinct ones).

The product of its (nonzero) digits is 2880000, while the sum is 47.

Subtracting from 1253548453520 its reverse (253548453521), we obtain a palindrome (999999999999).

The spelling of 1253548453520 in words is "one trillion, two hundred fifty-three billion, five hundred forty-eight million, four hundred fifty-three thousand, five hundred twenty".