25516297332420 has 24 divisors (see below), whose sum is σ = 71445632530944. Its totient is φ = 6804345955296.

The previous prime is 25516297332401. The next prime is 25516297332433. The reversal of 25516297332420 is 2423379261552.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212635811044 + ... + 212635811163.

It is an arithmetic number, because the mean of its divisors is an integer number (2976901355456).

Almost surely, 2^{25516297332420} is an apocalyptic number.

25516297332420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25516297332420 is an abundant number, since it is smaller than the sum of its proper divisors (45929335198524).

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

25516297332420 is a wasteful number, since it uses less digits than its factorization.

25516297332420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425271622219 (or 425271622217 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 51.

The spelling of 25516297332420 in words is "twenty-five trillion, five hundred sixteen billion, two hundred ninety-seven million, three hundred thirty-two thousand, four hundred twenty".