653793978241 has 2 divisors, whose sum is σ = 653793978242. Its totient is φ = 653793978240.

The previous prime is 653793978223. The next prime is 653793978269. The reversal of 653793978241 is 142879397356.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 651457222641 + 2336755600 = 807129^2 + 48340^2 .

It is a cyclic number.

It is not a de Polignac number, because 653793978241 - 2¹⁷ = 653793847169 is a prime.

It is not a weakly prime, because it can be changed into another prime (653793970241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326896989120 + 326896989121.

It is an arithmetic number, because the mean of its divisors is an integer number (326896989121).

Almost surely, 2^653793978241 is an apocalyptic number.

It is an amenable number.

653793978241 is a deficient number, since it is larger than the sum of its proper divisors (1).

653793978241 is an equidigital number, since it uses as much as digits as its factorization.

653793978241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68584320, while the sum is 64.

The spelling of 653793978241 in words is "six hundred fifty-three billion, seven hundred ninety-three million, nine hundred seventy-eight thousand, two hundred forty-one".