16505526025 has 12 divisors (see below), whose sum is σ = 20515480204. Its totient is φ = 13173048000.

The previous prime is 16505525957. The next prime is 16505526029. The reversal of 16505526025 is 52062550561.

It can be written as a sum of positive squares in 6 ways, for example, as 10003200256 + 6502325769 = 100016^2 + 80637^2 .

It is a de Polignac number, because none of the positive numbers 2^k-16505526025 is a prime.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16505526029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 773586 + ... + 794635.

Almost surely, 2^16505526025 is an apocalyptic number.

It is an amenable number.

16505526025 is a deficient number, since it is larger than the sum of its proper divisors (4009954179).

16505526025 is a wasteful number, since it uses less digits than its factorization.

16505526025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1568652 (or 1568647 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 37.

The spelling of 16505526025 in words is "sixteen billion, five hundred five million, five hundred twenty-six thousand, twenty-five".