25611056420 has 24 divisors (see below), whose sum is σ = 53825990400. Its totient is φ = 10236275552.

The previous prime is 25611056407. The next prime is 25611056437. The reversal of 25611056420 is 2465011652.

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, 483380 + ... + 533739.

It is an arithmetic number, because the mean of its divisors is an integer number (2242749600).

Almost surely, 2^25611056420 is an apocalyptic number.

25611056420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25611056420 is an abundant number, since it is smaller than the sum of its proper divisors (28214933980).

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

25611056420 is a wasteful number, since it uses less digits than its factorization.

25611056420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018387 (or 1018385 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The spelling of 25611056420 in words is "twenty-five billion, six hundred eleven million, fifty-six thousand, four hundred twenty".