1531541975040 has 1872 divisors, whose sum is σ = 6949901776896. Its totient is φ = 302756659200.

The previous prime is 1531541975027. The next prime is 1531541975129. The reversal of 1531541975040 is 405791451351.

1531541975040 is a `hidden beast` number, since 1 + 5 + 3 + 1 + 54 + 1 + 97 + 504 + 0 = 666.

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 143 ways as a sum of consecutive naturals, for example, 25958338531 + ... + 25958338589.

It is an arithmetic number, because the mean of its divisors is an integer number (3712554368).

Almost surely, 2^{1531541975040} is an apocalyptic number.

1531541975040 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 1531541975040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3474950888448).

1531541975040 is an abundant number, since it is smaller than the sum of its proper divisors (5418359801856).

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

1531541975040 is a wasteful number, since it uses less digits than its factorization.

1531541975040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 45.

The spelling of 1531541975040 in words is "one trillion, five hundred thirty-one billion, five hundred forty-one million, nine hundred seventy-five thousand, forty".