25985631511 has 16 divisors (see below), whose sum is σ = 30809044800. Its totient is φ = 21444369408.

The previous prime is 25985631509. The next prime is 25985631527. The reversal of 25985631511 is 11513658952.

It is not a de Polignac number, because 25985631511 - 2¹ = 25985631509 is a prime.

It is a super-2 number, since 2×25985631511² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25985601511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109656 + ... + 252973.

It is an arithmetic number, because the mean of its divisors is an integer number (1925565300).

Almost surely, 2^25985631511 is an apocalyptic number.

25985631511 is a deficient number, since it is larger than the sum of its proper divisors (4823413289).

25985631511 is a wasteful number, since it uses less digits than its factorization.

25985631511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363018.

The product of its digits is 324000, while the sum is 46.

The spelling of 25985631511 in words is "twenty-five billion, nine hundred eighty-five million, six hundred thirty-one thousand, five hundred eleven".