1025531453520 has 480 divisors, whose sum is σ = 4025823759360. Its totient is φ = 229078056960.

The previous prime is 1025531453519. The next prime is 1025531453539. The reversal of 1025531453520 is 253541355201.

1025531453520 is a `hidden beast` number, since 1 + 0 + 2 + 55 + 31 + 4 + 53 + 520 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 180262836 + ... + 180268524.

It is an arithmetic number, because the mean of its divisors is an integer number (8387132832).

Almost surely, 2^{1025531453520} is an apocalyptic number.

1025531453520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1025531453520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2012911879680).

1025531453520 is an abundant number, since it is smaller than the sum of its proper divisors (3000292305840).

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

1025531453520 is a wasteful number, since it uses less digits than its factorization.

1025531453520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6523 (or 6514 counting only the distinct ones).

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

The spelling of 1025531453520 in words is "one trillion, twenty-five billion, five hundred thirty-one million, four hundred fifty-three thousand, five hundred twenty".