354777166981 has 2 divisors, whose sum is σ = 354777166982. Its totient is φ = 354777166980.

The previous prime is 354777166969. The next prime is 354777166993. The reversal of 354777166981 is 189661777453.

It is a balanced prime because it is at equal distance from previous prime (354777166969) and next prime (354777166993).

It can be written as a sum of positive squares in only one way, i.e., 196130293956 + 158646873025 = 442866^2 + 398305^2 .

It is an emirp because it is prime and its reverse (189661777453) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-354777166981 is a prime.

It is a super-2 number, since 2×354777166981² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (354777166181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177388583490 + 177388583491.

It is an arithmetic number, because the mean of its divisors is an integer number (177388583491).

Almost surely, 2^354777166981 is an apocalyptic number.

It is an amenable number.

354777166981 is a deficient number, since it is larger than the sum of its proper divisors (1).

354777166981 is an equidigital number, since it uses as much as digits as its factorization.

354777166981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53343360, while the sum is 64.

The spelling of 354777166981 in words is "three hundred fifty-four billion, seven hundred seventy-seven million, one hundred sixty-six thousand, nine hundred eighty-one".