16145521053520 has 80 divisors (see below), whose sum is σ = 41474581528320. Its totient is φ = 5814039283712.

The previous prime is 16145521053491. The next prime is 16145521053539. The reversal of 16145521053520 is 2535012554161.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 258049300 + ... + 258111859.

It is an arithmetic number, because the mean of its divisors is an integer number (518432269104).

Almost surely, 2^{16145521053520} is an apocalyptic number.

16145521053520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16145521053520 is an abundant number, since it is smaller than the sum of its proper divisors (25329060474800).

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

16145521053520 is a wasteful number, since it uses less digits than its factorization.

16145521053520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516161212 (or 516161206 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 40.

The spelling of 16145521053520 in words is "sixteen trillion, one hundred forty-five billion, five hundred twenty-one million, fifty-three thousand, five hundred twenty".