1538522494740 has 1728 divisors, whose sum is σ = 6767443468800. Its totient is φ = 287571271680.

The previous prime is 1538522494711. The next prime is 1538522494783. The reversal of 1538522494740 is 474942258351.

It is a happy number.

1538522494740 is a `hidden beast` number, since 1 + 5 + 3 + 8 + 522 + 49 + 4 + 74 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 575 ways as a sum of consecutive naturals, for example, 1251848446 + ... + 1251849674.

It is an arithmetic number, because the mean of its divisors is an integer number (3916344600).

Almost surely, 2^{1538522494740} is an apocalyptic number.

1538522494740 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 1538522494740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3383721734400).

1538522494740 is an abundant number, since it is smaller than the sum of its proper divisors (5228920974060).

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

1538522494740 is a wasteful number, since it uses less digits than its factorization.

1538522494740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1323 (or 1297 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 54.

The spelling of 1538522494740 in words is "one trillion, five hundred thirty-eight billion, five hundred twenty-two million, four hundred ninety-four thousand, seven hundred forty".