53747421617 has 2 divisors, whose sum is σ = 53747421618. Its totient is φ = 53747421616.

The previous prime is 53747421613. The next prime is 53747421659. The reversal of 53747421617 is 71612474735.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52822288561 + 925133056 = 229831^2 + 30416^2 .

It is a cyclic number.

It is not a de Polignac number, because 53747421617 - 2² = 53747421613 is a prime.

It is not a weakly prime, because it can be changed into another prime (53747421613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26873710808 + 26873710809.

It is an arithmetic number, because the mean of its divisors is an integer number (26873710809).

Almost surely, 2^53747421617 is an apocalyptic number.

It is an amenable number.

53747421617 is a deficient number, since it is larger than the sum of its proper divisors (1).

53747421617 is an equidigital number, since it uses as much as digits as its factorization.

53747421617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 987840, while the sum is 47.

The spelling of 53747421617 in words is "fifty-three billion, seven hundred forty-seven million, four hundred twenty-one thousand, six hundred seventeen".