274577659981 has 2 divisors, whose sum is σ = 274577659982. Its totient is φ = 274577659980.

The previous prime is 274577659903. The next prime is 274577659987. The reversal of 274577659981 is 189956775472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 269641332900 + 4936327081 = 519270^2 + 70259^2 .

It is a cyclic number.

It is not a de Polignac number, because 274577659981 - 2²³ = 274569271373 is a prime.

It is a super-2 number, since 2×274577659981² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 274577659981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (274577659987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137288829990 + 137288829991.

It is an arithmetic number, because the mean of its divisors is an integer number (137288829991).

Almost surely, 2^274577659981 is an apocalyptic number.

It is an amenable number.

274577659981 is a deficient number, since it is larger than the sum of its proper divisors (1).

274577659981 is an equidigital number, since it uses as much as digits as its factorization.

274577659981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 266716800, while the sum is 70.

The spelling of 274577659981 in words is "two hundred seventy-four billion, five hundred seventy-seven million, six hundred fifty-nine thousand, nine hundred eighty-one".