354876332209561 has 2 divisors, whose sum is σ = 354876332209562. Its totient is φ = 354876332209560.

The previous prime is 354876332209547. The next prime is 354876332209669. The reversal of 354876332209561 is 165902233678453.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 354265990022025 + 610342187536 = 18821955^2 + 781244^2 .

It is a cyclic number.

It is not a de Polignac number, because 354876332209561 - 2³⁵ = 354841972471193 is a prime.

It is a super-2 number, since 2×354876332209561² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 354876332209493 and 354876332209502.

It is not a weakly prime, because it can be changed into another prime (354876332209501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177438166104780 + 177438166104781.

It is an arithmetic number, because the mean of its divisors is an integer number (177438166104781).

It is a 1-persistent number, because it is pandigital, but 2⋅354876332209561 = 709752664419122 is not.

Almost surely, 2^{354876332209561} is an apocalyptic number.

It is an amenable number.

354876332209561 is a deficient number, since it is larger than the sum of its proper divisors (1).

354876332209561 is an equidigital number, since it uses as much as digits as its factorization.

354876332209561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 195955200, while the sum is 64.

The spelling of 354876332209561 in words is "three hundred fifty-four trillion, eight hundred seventy-six billion, three hundred thirty-two million, two hundred nine thousand, five hundred sixty-one".