25552641646 has 32 divisors (see below), whose sum is σ = 45351060480. Its totient is φ = 10565100000.

The previous prime is 25552641643. The next prime is 25552641649. The reversal of 25552641646 is 64614625552.

It is an interprime number because it is at equal distance from previous prime (25552641643) and next prime (25552641649).

It is a junction number, because it is equal to n+sod(n) for n = 25552641596 and 25552641605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25552641643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 499771 + ... + 548521.

It is an arithmetic number, because the mean of its divisors is an integer number (1417220640).

Almost surely, 2^25552641646 is an apocalyptic number.

25552641646 is a deficient number, since it is larger than the sum of its proper divisors (19798418834).

25552641646 is a wasteful number, since it uses less digits than its factorization.

25552641646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50080.

The product of its digits is 1728000, while the sum is 46.

The spelling of 25552641646 in words is "twenty-five billion, five hundred fifty-two million, six hundred forty-one thousand, six hundred forty-six".