354665416261 has 4 divisors (see below), whose sum is σ = 381947371372. Its totient is φ = 327383461152.

The previous prime is 354665416181. The next prime is 354665416279. The reversal of 354665416261 is 162614566453.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 162614566453 = 3313 ⋅49083781.

It can be written as a sum of positive squares in 2 ways, for example, as 123911040100 + 230754376161 = 352010^2 + 480369^2 .

It is a cyclic number.

It is not a de Polignac number, because 354665416261 - 2¹⁵ = 354665383493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (354665416361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13640977536 + ... + 13640977561.

It is an arithmetic number, because the mean of its divisors is an integer number (95486842843).

Almost surely, 2^354665416261 is an apocalyptic number.

It is an amenable number.

354665416261 is a deficient number, since it is larger than the sum of its proper divisors (27281955111).

354665416261 is a wasteful number, since it uses less digits than its factorization.

354665416261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27281955110.

The product of its digits is 3110400, while the sum is 49.

The spelling of 354665416261 in words is "three hundred fifty-four billion, six hundred sixty-five million, four hundred sixteen thousand, two hundred sixty-one".