56701551649 has 2 divisors, whose sum is σ = 56701551650. Its totient is φ = 56701551648.

The previous prime is 56701551637. The next prime is 56701551677. The reversal of 56701551649 is 94615510765.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46480341649 + 10221210000 = 215593^2 + 101100^2 .

It is a cyclic number.

It is not a de Polignac number, because 56701551649 - 2³¹ = 54554068001 is a prime.

It is not a weakly prime, because it can be changed into another prime (56701551149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28350775824 + 28350775825.

It is an arithmetic number, because the mean of its divisors is an integer number (28350775825).

Almost surely, 2^56701551649 is an apocalyptic number.

It is an amenable number.

56701551649 is a deficient number, since it is larger than the sum of its proper divisors (1).

56701551649 is an equidigital number, since it uses as much as digits as its factorization.

56701551649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1134000, while the sum is 49.

The spelling of 56701551649 in words is "fifty-six billion, seven hundred one million, five hundred fifty-one thousand, six hundred forty-nine".