53501983729 has 2 divisors, whose sum is σ = 53501983730. Its totient is φ = 53501983728.

The previous prime is 53501983657. The next prime is 53501983747. The reversal of 53501983729 is 92738910535.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46548925504 + 6953058225 = 215752^2 + 83385^2 .

It is a cyclic number.

It is not a de Polignac number, because 53501983729 - 2³¹ = 51354500081 is a prime.

It is not a weakly prime, because it can be changed into another prime (53501983429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26750991864 + 26750991865.

It is an arithmetic number, because the mean of its divisors is an integer number (26750991865).

Almost surely, 2^53501983729 is an apocalyptic number.

It is an amenable number.

53501983729 is a deficient number, since it is larger than the sum of its proper divisors (1).

53501983729 is an equidigital number, since it uses as much as digits as its factorization.

53501983729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2041200, while the sum is 52.

The spelling of 53501983729 in words is "fifty-three billion, five hundred one million, nine hundred eighty-three thousand, seven hundred twenty-nine".