981777484579 has 2 divisors, whose sum is σ = 981777484580. Its totient is φ = 981777484578.

The previous prime is 981777484561. The next prime is 981777484613. The reversal of 981777484579 is 975484777189.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 981777484579 - 2³¹ = 979630000931 is a prime.

It is not a weakly prime, because it can be changed into another prime (981777484379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490888742289 + 490888742290.

It is an arithmetic number, because the mean of its divisors is an integer number (490888742290).

Almost surely, 2^981777484579 is an apocalyptic number.

981777484579 is a deficient number, since it is larger than the sum of its proper divisors (1).

981777484579 is an equidigital number, since it uses as much as digits as its factorization.

981777484579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 995742720, while the sum is 76.

The spelling of 981777484579 in words is "nine hundred eighty-one billion, seven hundred seventy-seven million, four hundred eighty-four thousand, five hundred seventy-nine".