20125526661765 has 24 divisors (see below), whose sum is σ = 39867709959168. Its totient is φ = 9200240759520.

The previous prime is 20125526661761. The next prime is 20125526661767. The reversal of 20125526661765 is 56716662552102.

It is not a de Polignac number, because 20125526661765 - 2² = 20125526661761 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20125526661761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31945280101 + ... + 31945280730.

It is an arithmetic number, because the mean of its divisors is an integer number (1661154581632).

Almost surely, 2^{20125526661765} is an apocalyptic number.

It is an amenable number.

20125526661765 is a deficient number, since it is larger than the sum of its proper divisors (19742183297403).

20125526661765 is a wasteful number, since it uses less digits than its factorization.

20125526661765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63890560849 (or 63890560846 counting only the distinct ones).

The product of its (nonzero) digits is 9072000, while the sum is 54.

The spelling of 20125526661765 in words is "twenty trillion, one hundred twenty-five billion, five hundred twenty-six million, six hundred sixty-one thousand, seven hundred sixty-five".