354870898465 has 4 divisors (see below), whose sum is σ = 425845078164. Its totient is φ = 283896718768.

The previous prime is 354870898453. The next prime is 354870898549. The reversal of 354870898465 is 564898078453.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 564898078453 = 342653 ⋅1648601.

It can be written as a sum of positive squares in 2 ways, for example, as 135141523456 + 219729375009 = 367616^2 + 468753^2 .

It is a cyclic number.

It is not a de Polignac number, because 354870898465 - 2¹³ = 354870890273 is a prime.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 354870898465.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35487089842 + ... + 35487089851.

It is an arithmetic number, because the mean of its divisors is an integer number (106461269541).

Almost surely, 2^354870898465 is an apocalyptic number.

It is an amenable number.

354870898465 is a deficient number, since it is larger than the sum of its proper divisors (70974179699).

354870898465 is an equidigital number, since it uses as much as digits as its factorization.

354870898465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70974179698.

The product of its (nonzero) digits is 232243200, while the sum is 67.

The spelling of 354870898465 in words is "three hundred fifty-four billion, eight hundred seventy million, eight hundred ninety-eight thousand, four hundred sixty-five".