98051771561 has 2 divisors, whose sum is σ = 98051771562. Its totient is φ = 98051771560.

The previous prime is 98051771483. The next prime is 98051771581. The reversal of 98051771561 is 16517715089.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58348818025 + 39702953536 = 241555^2 + 199256^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98051771561 is a prime.

It is a super-2 number, since 2×98051771561² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (98051771581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49025885780 + 49025885781.

It is an arithmetic number, because the mean of its divisors is an integer number (49025885781).

Almost surely, 2^98051771561 is an apocalyptic number.

It is an amenable number.

98051771561 is a deficient number, since it is larger than the sum of its proper divisors (1).

98051771561 is an equidigital number, since it uses as much as digits as its factorization.

98051771561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 529200, while the sum is 50.

The spelling of 98051771561 in words is "ninety-eight billion, fifty-one million, seven hundred seventy-one thousand, five hundred sixty-one".