25783754121 has 6 divisors (see below), whose sum is σ = 37243200410. Its totient is φ = 17189169408.

The previous prime is 25783754119. The next prime is 25783754141. The reversal of 25783754121 is 12145738752.

25783754121 is a `hidden beast` number, since 2 + 5 + 7 + 83 + 7 + 541 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 25556498496 + 227255625 = 159864^2 + 15075^2 .

It is not a de Polignac number, because 25783754121 - 2¹ = 25783754119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25783754141) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1432430776 + ... + 1432430793.

Almost surely, 2^25783754121 is an apocalyptic number.

It is an amenable number.

25783754121 is a deficient number, since it is larger than the sum of its proper divisors (11459446289).

25783754121 is a wasteful number, since it uses less digits than its factorization.

25783754121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2864861575 (or 2864861572 counting only the distinct ones).

The product of its digits is 470400, while the sum is 45.

The spelling of 25783754121 in words is "twenty-five billion, seven hundred eighty-three million, seven hundred fifty-four thousand, one hundred twenty-one".