1521006561492 has 96 divisors (see below), whose sum is σ = 3968428464000. Its totient is φ = 449403494400.

The previous prime is 1521006561479. The next prime is 1521006561559. The reversal of 1521006561492 is 2941656001251.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9166884 + ... + 9331332.

It is an arithmetic number, because the mean of its divisors is an integer number (41337796500).

Almost surely, 2^{1521006561492} is an apocalyptic number.

1521006561492 is a gapful number since it is divisible by the number (12) 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 1521006561492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1984214232000).

1521006561492 is an abundant number, since it is smaller than the sum of its proper divisors (2447421902508).

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

1521006561492 is a wasteful number, since it uses less digits than its factorization.

1521006561492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166217 (or 166215 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 42.

The spelling of 1521006561492 in words is "one trillion, five hundred twenty-one billion, six million, five hundred sixty-one thousand, four hundred ninety-two".