1425806581500 has 576 divisors, whose sum is σ = 5473614182400. Its totient is φ = 311721379200.

The previous prime is 1425806581469. The next prime is 1425806581543. The reversal of 1425806581500 is 51856085241.

1425806581500 is a `hidden beast` number, since 1 + 4 + 2 + 5 + 8 + 0 + 65 + 81 + 500 = 666.

It is a super-2 number, since 2×1425806581500² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 35480419 + ... + 35520581.

It is an arithmetic number, because the mean of its divisors is an integer number (9502802400).

Almost surely, 2^{1425806581500} is an apocalyptic number.

1425806581500 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 1425806581500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2736807091200).

1425806581500 is an abundant number, since it is smaller than the sum of its proper divisors (4047807600900).

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

1425806581500 is a wasteful number, since it uses less digits than its factorization.

1425806581500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40232 (or 40203 counting only the distinct ones).

The product of its (nonzero) digits is 384000, while the sum is 45.

The spelling of 1425806581500 in words is "one trillion, four hundred twenty-five billion, eight hundred six million, five hundred eighty-one thousand, five hundred".