349421609661 has 16 divisors (see below), whose sum is σ = 493317791424. Its totient is φ = 219237511424.

The previous prime is 349421609611. The next prime is 349421609671. The reversal of 349421609661 is 166906124943.

It is a cyclic number.

It is not a de Polignac number, because 349421609661 - 2⁹ = 349421609149 is a prime.

It is a super-2 number, since 2×349421609661² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (349421609611) 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, 1674046 + ... + 1871168.

It is an arithmetic number, because the mean of its divisors is an integer number (30832361964).

Almost surely, 2^349421609661 is an apocalyptic number.

It is an amenable number.

349421609661 is a deficient number, since it is larger than the sum of its proper divisors (143896181763).

349421609661 is a wasteful number, since it uses less digits than its factorization.

349421609661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231900.

The product of its (nonzero) digits is 1679616, while the sum is 51.

The spelling of 349421609661 in words is "three hundred forty-nine billion, four hundred twenty-one million, six hundred nine thousand, six hundred sixty-one".