25532261406 has 24 divisors (see below), whose sum is σ = 57725113680. Its totient is φ = 8140720896.

The previous prime is 25532261401. The next prime is 25532261423. The reversal of 25532261406 is 60416223552.

25532261406 is a `hidden beast` number, since 2 + 5 + 5 + 32 + 2 + 614 + 0 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25532261401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30835651 + ... + 30836478.

It is an arithmetic number, because the mean of its divisors is an integer number (2405213070).

Almost surely, 2^25532261406 is an apocalyptic number.

25532261406 is an abundant number, since it is smaller than the sum of its proper divisors (32192852274).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25532261406 is a wasteful number, since it uses less digits than its factorization.

25532261406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61672160 (or 61672157 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

Adding to 25532261406 its reverse (60416223552), we get a palindrome (85948484958).

The spelling of 25532261406 in words is "twenty-five billion, five hundred thirty-two million, two hundred sixty-one thousand, four hundred six".