25487255081 has 8 divisors (see below), whose sum is σ = 26065774080. Its totient is φ = 24910246048.

The previous prime is 25487255077. The next prime is 25487255107. The reversal of 25487255081 is 18055278452.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25487255081 - 2² = 25487255077 is a prime.

It is a super-2 number, since 2×25487255081² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25487255681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 343316 + ... + 410901.

It is an arithmetic number, because the mean of its divisors is an integer number (3258221760).

Almost surely, 2^25487255081 is an apocalyptic number.

It is an amenable number.

25487255081 is a deficient number, since it is larger than the sum of its proper divisors (578518999).

25487255081 is an equidigital number, since it uses as much as digits as its factorization.

25487255081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754983.

The product of its (nonzero) digits is 896000, while the sum is 47.

The spelling of 25487255081 in words is "twenty-five billion, four hundred eighty-seven million, two hundred fifty-five thousand, eighty-one".