1253454450520 has 16 divisors (see below), whose sum is σ = 2820272513760. Its totient is φ = 501381780192.

The previous prime is 1253454450497. The next prime is 1253454450539. The reversal of 1253454450520 is 250544543521.

It is a super-2 number, since 2×1253454450520² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 31336361263 = 1253454450520 / (1 + 2 + 5 + 3 + 4 + 5 + 4 + 4 + 5 + 0 + 5 + 2 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15668180592 + ... + 15668180671.

It is an arithmetic number, because the mean of its divisors is an integer number (176267032110).

Almost surely, 2^{1253454450520} is an apocalyptic number.

1253454450520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1253454450520 is an abundant number, since it is smaller than the sum of its proper divisors (1566818063240).

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

1253454450520 is a wasteful number, since it uses less digits than its factorization.

1253454450520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31336361274 (or 31336361270 counting only the distinct ones).

The product of its (nonzero) digits is 480000, while the sum is 40.

The spelling of 1253454450520 in words is "one trillion, two hundred fifty-three billion, four hundred fifty-four million, four hundred fifty thousand, five hundred twenty".