25502805536 has 48 divisors (see below), whose sum is σ = 56421779904. Its totient is φ = 11258759424.

The previous prime is 25502805491. The next prime is 25502805541. The reversal of 25502805536 is 63550820552.

It is a junction number, because it is equal to n+sod(n) for n = 25502805493 and 25502805502.

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, 1323146 + ... + 1342281.

It is an arithmetic number, because the mean of its divisors is an integer number (1175453748).

Almost surely, 2^25502805536 is an apocalyptic number.

25502805536 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

25502805536 is an abundant number, since it is smaller than the sum of its proper divisors (30918974368).

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

25502805536 is a wasteful number, since it uses less digits than its factorization.

25502805536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2665473 (or 2665465 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 41.

The spelling of 25502805536 in words is "twenty-five billion, five hundred two million, eight hundred five thousand, five hundred thirty-six".