1253530420551 has 8 divisors (see below), whose sum is σ = 1857082104560. Its totient is φ = 835686947016.

The previous prime is 1253530420543. The next prime is 1253530420589. The reversal of 1253530420551 is 1550240353521.

1253530420551 is a `hidden beast` number, since 1 + 2 + 5 + 35 + 30 + 42 + 0 + 551 = 666.

It is not a de Polignac number, because 1253530420551 - 2³ = 1253530420543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1253530420531) 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, 23213526280 + ... + 23213526333.

It is an arithmetic number, because the mean of its divisors is an integer number (232135263070).

Almost surely, 2^{1253530420551} is an apocalyptic number.

1253530420551 is a deficient number, since it is larger than the sum of its proper divisors (603551684009).

1253530420551 is an equidigital number, since it uses as much as digits as its factorization.

1253530420551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46427052622 (or 46427052616 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

The spelling of 1253530420551 in words is "one trillion, two hundred fifty-three billion, five hundred thirty million, four hundred twenty thousand, five hundred fifty-one".