25520434420012 has 48 divisors (see below), whose sum is σ = 54976700880640. Its totient is φ = 10120710825792.

The previous prime is 25520434420003. The next prime is 25520434420067. The reversal of 25520434420012 is 21002443402552.

It is a super-2 number, since 2×25520434420012² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25520434420012.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 557776443 + ... + 557822194.

Almost surely, 2^{25520434420012} is an apocalyptic number.

It is an amenable number.

25520434420012 is an abundant number, since it is smaller than the sum of its proper divisors (29456266460628).

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

25520434420012 is a wasteful number, since it uses less digits than its factorization.

25520434420012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115598710 (or 1115598708 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 34.

Adding to 25520434420012 its reverse (21002443402552), we get a palindrome (46522877822564).

The spelling of 25520434420012 in words is "twenty-five trillion, five hundred twenty billion, four hundred thirty-four million, four hundred twenty thousand, twelve".