354097881581 has 2 divisors, whose sum is σ = 354097881582. Its totient is φ = 354097881580.

The previous prime is 354097881551. The next prime is 354097881593. The reversal of 354097881581 is 185188790453.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 214307888356 + 139789993225 = 462934^2 + 373885^2 .

It is a cyclic number.

It is not a de Polignac number, because 354097881581 - 2¹⁰ = 354097880557 is a prime.

It is a super-2 number, since 2×354097881581² (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 354097881581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (354097881521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177048940790 + 177048940791.

It is an arithmetic number, because the mean of its divisors is an integer number (177048940791).

Almost surely, 2^354097881581 is an apocalyptic number.

It is an amenable number.

354097881581 is a deficient number, since it is larger than the sum of its proper divisors (1).

354097881581 is an equidigital number, since it uses as much as digits as its factorization.

354097881581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9676800, while the sum is 59.

The spelling of 354097881581 in words is "three hundred fifty-four billion, ninety-seven million, eight hundred eighty-one thousand, five hundred eighty-one".