354640908891 has 16 divisors (see below), whose sum is σ = 489028147200. Its totient is φ = 228467823168.

The previous prime is 354640908887. The next prime is 354640908893. The reversal of 354640908891 is 198809046453.

It is not a de Polignac number, because 354640908891 - 2² = 354640908887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (354640908893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15907746 + ... + 15930023.

It is an arithmetic number, because the mean of its divisors is an integer number (30564259200).

Almost surely, 2^354640908891 is an apocalyptic number.

354640908891 is a deficient number, since it is larger than the sum of its proper divisors (134387238309).

354640908891 is a wasteful number, since it uses less digits than its factorization.

354640908891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31837898.

The product of its (nonzero) digits is 7464960, while the sum is 57.

The spelling of 354640908891 in words is "three hundred fifty-four billion, six hundred forty million, nine hundred eight thousand, eight hundred ninety-one".