988742777461 has 2 divisors, whose sum is σ = 988742777462. Its totient is φ = 988742777460.

The previous prime is 988742777443. The next prime is 988742777471. The reversal of 988742777461 is 164777247889.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 967480763236 + 21262014225 = 983606^2 + 145815^2 .

It is a cyclic number.

It is not a de Polignac number, because 988742777461 - 2¹⁷ = 988742646389 is a prime.

It is a super-2 number, since 2×988742777461² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (988742777411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494371388730 + 494371388731.

It is an arithmetic number, because the mean of its divisors is an integer number (494371388731).

Almost surely, 2^988742777461 is an apocalyptic number.

It is an amenable number.

988742777461 is a deficient number, since it is larger than the sum of its proper divisors (1).

988742777461 is an equidigital number, since it uses as much as digits as its factorization.

988742777461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 265531392, while the sum is 70.

The spelling of 988742777461 in words is "nine hundred eighty-eight billion, seven hundred forty-two million, seven hundred seventy-seven thousand, four hundred sixty-one".