26620648436 has 6 divisors (see below), whose sum is σ = 46586134770. Its totient is φ = 13310324216.

The previous prime is 26620648427. The next prime is 26620648487. The reversal of 26620648436 is 63484602662.

It can be written as a sum of positive squares in only one way, i.e., 15979488100 + 10641160336 = 126410^2 + 103156^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3327581051 + ... + 3327581058.

It is an arithmetic number, because the mean of its divisors is an integer number (7764355795).

Almost surely, 2^26620648436 is an apocalyptic number.

It is an amenable number.

26620648436 is a deficient number, since it is larger than the sum of its proper divisors (19965486334).

26620648436 is a wasteful number, since it uses less digits than its factorization.

26620648436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6655162113 (or 6655162111 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 47.

The spelling of 26620648436 in words is "twenty-six billion, six hundred twenty million, six hundred forty-eight thousand, four hundred thirty-six".