354889689781 has 16 divisors (see below), whose sum is σ = 387584241408. Its totient is φ = 322267348800.

The previous prime is 354889689719. The next prime is 354889689839. The reversal of 354889689781 is 187986988453.

It is a cyclic number.

It is not a de Polignac number, because 354889689781 - 2⁷ = 354889689653 is a prime.

It is a super-2 number, since 2×354889689781² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 354889689698 and 354889689707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (354889689701) 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, 46858711 + ... + 46866283.

It is an arithmetic number, because the mean of its divisors is an integer number (24224015088).

Almost surely, 2^354889689781 is an apocalyptic number.

It is an amenable number.

354889689781 is a deficient number, since it is larger than the sum of its proper divisors (32694551627).

354889689781 is a wasteful number, since it uses less digits than its factorization.

354889689781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11772.

The product of its digits is 836075520, while the sum is 76.

The spelling of 354889689781 in words is "three hundred fifty-four billion, eight hundred eighty-nine million, six hundred eighty-nine thousand, seven hundred eighty-one".