25485021511 has 8 divisors (see below), whose sum is σ = 25814200320. Its totient is φ = 25156007448.

The previous prime is 25485021491. The next prime is 25485021571. The reversal of 25485021511 is 11512058452.

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 25485021511 - 2⁹ = 25485020999 is a prime.

It is a super-2 number, since 2×25485021511² (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 (25485021571) 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, 286950 + ... + 365116.

It is an arithmetic number, because the mean of its divisors is an integer number (3226775040).

Almost surely, 2^25485021511 is an apocalyptic number.

25485021511 is a deficient number, since it is larger than the sum of its proper divisors (329178809).

25485021511 is an equidigital number, since it uses as much as digits as its factorization.

25485021511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82373.

The product of its (nonzero) digits is 16000, while the sum is 34.

Adding to 25485021511 its reverse (11512058452), we get a palindrome (36997079963).

The spelling of 25485021511 in words is "twenty-five billion, four hundred eighty-five million, twenty-one thousand, five hundred eleven".