25661647070 has 16 divisors (see below), whose sum is σ = 47265174000. Its totient is φ = 10025945664.

The previous prime is 25661647061. The next prime is 25661647117. The reversal of 25661647070 is 7074616652.

It is a congruent number.

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, 29838695 + ... + 29839554.

It is an arithmetic number, because the mean of its divisors is an integer number (2954073375).

Almost surely, 2^25661647070 is an apocalyptic number.

25661647070 is a deficient number, since it is larger than the sum of its proper divisors (21603526930).

25661647070 is a wasteful number, since it uses less digits than its factorization.

25661647070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59678299.

The product of its (nonzero) digits is 423360, while the sum is 44.

The spelling of 25661647070 in words is "twenty-five billion, six hundred sixty-one million, six hundred forty-seven thousand, seventy".