254616616421 has 2 divisors, whose sum is σ = 254616616422. Its totient is φ = 254616616420.

The previous prime is 254616616363. The next prime is 254616616489. The reversal of 254616616421 is 124616616452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 228034900900 + 26581715521 = 477530^2 + 163039^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-254616616421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (254616616721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127308308210 + 127308308211.

It is an arithmetic number, because the mean of its divisors is an integer number (127308308211).

Almost surely, 2^254616616421 is an apocalyptic number.

It is an amenable number.

254616616421 is a deficient number, since it is larger than the sum of its proper divisors (1).

254616616421 is an equidigital number, since it uses as much as digits as its factorization.

254616616421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 414720, while the sum is 44.

The spelling of 254616616421 in words is "two hundred fifty-four billion, six hundred sixteen million, six hundred sixteen thousand, four hundred twenty-one".