25277550081 has 24 divisors (see below), whose sum is σ = 39214787040. Its totient is φ = 14441075712.

The previous prime is 25277550041. The next prime is 25277550101. The reversal of 25277550081 is 18005577252.

It is not a de Polignac number, because 25277550081 - 2⁹ = 25277549569 is a prime.

It is a super-2 number, since 2×25277550081² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25277550041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 739905 + ... + 773313.

It is an arithmetic number, because the mean of its divisors is an integer number (1633949460).

Almost surely, 2^25277550081 is an apocalyptic number.

25277550081 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

25277550081 is a deficient number, since it is larger than the sum of its proper divisors (13937236959).

25277550081 is a wasteful number, since it uses less digits than its factorization.

25277550081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38573 (or 38566 counting only the distinct ones).

The product of its (nonzero) digits is 196000, while the sum is 42.

The spelling of 25277550081 in words is "twenty-five billion, two hundred seventy-seven million, five hundred fifty thousand, eighty-one".