25766621011 has 16 divisors (see below), whose sum is σ = 27112030848. Its totient is φ = 24464404800.

The previous prime is 25766620991. The next prime is 25766621021. The reversal of 25766621011 is 11012666752.

It is a happy number.

It is not a de Polignac number, because 25766621011 - 2¹⁹ = 25766096723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25766621021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171496 + ... + 284506.

It is an arithmetic number, because the mean of its divisors is an integer number (1694501928).

Almost surely, 2^25766621011 is an apocalyptic number.

25766621011 is a deficient number, since it is larger than the sum of its proper divisors (1345409837).

25766621011 is a wasteful number, since it uses less digits than its factorization.

25766621011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113202.

The product of its (nonzero) digits is 30240, while the sum is 37.

The spelling of 25766621011 in words is "twenty-five billion, seven hundred sixty-six million, six hundred twenty-one thousand, eleven".