20251416565 has 8 divisors (see below), whose sum is σ = 24302679480. Its totient is φ = 16200480192.

The previous prime is 20251416511. The next prime is 20251416587. The reversal of 20251416565 is 56561415202.

It can be written as a sum of positive squares in 4 ways, for example, as 3344655889 + 16906760676 = 57833^2 + 130026^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20251416565 - 2²³ = 20243027957 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86167 + ... + 218923.

It is an arithmetic number, because the mean of its divisors is an integer number (3037834935).

Almost surely, 2^20251416565 is an apocalyptic number.

It is an amenable number.

20251416565 is a deficient number, since it is larger than the sum of its proper divisors (4051262915).

20251416565 is a wasteful number, since it uses less digits than its factorization.

20251416565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163271.

The product of its (nonzero) digits is 72000, while the sum is 37.

The spelling of 20251416565 in words is "twenty billion, two hundred fifty-one million, four hundred sixteen thousand, five hundred sixty-five".