56959661549 has 4 divisors (see below), whose sum is σ = 65096756064. Its totient is φ = 48822567036.

The previous prime is 56959661531. The next prime is 56959661557. The reversal of 56959661549 is 94516695965.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 56959661549 - 2⁸ = 56959661293 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56959661509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4068547247 + ... + 4068547260.

It is an arithmetic number, because the mean of its divisors is an integer number (16274189016).

Almost surely, 2^56959661549 is an apocalyptic number.

It is an amenable number.

56959661549 is a deficient number, since it is larger than the sum of its proper divisors (8137094515).

56959661549 is an equidigital number, since it uses as much as digits as its factorization.

56959661549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8137094514.

The product of its digits is 78732000, while the sum is 65.

The spelling of 56959661549 in words is "fifty-six billion, nine hundred fifty-nine million, six hundred sixty-one thousand, five hundred forty-nine".