351890223561 has 32 divisors (see below), whose sum is σ = 522485040000. Its totient is φ = 234069295104.

The previous prime is 351890223557. The next prime is 351890223617. The reversal of 351890223561 is 165322098153.

351890223561 is a `hidden beast` number, since 3 + 5 + 1 + 89 + 0 + 2 + 2 + 3 + 561 = 666.

It is not a de Polignac number, because 351890223561 - 2² = 351890223557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (351890223541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23932390 + ... + 23947088.

It is an arithmetic number, because the mean of its divisors is an integer number (16327657500).

Almost surely, 2^351890223561 is an apocalyptic number.

It is an amenable number.

351890223561 is a deficient number, since it is larger than the sum of its proper divisors (170594816439).

351890223561 is a wasteful number, since it uses less digits than its factorization.

351890223561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16630 (or 16624 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The spelling of 351890223561 in words is "three hundred fifty-one billion, eight hundred ninety million, two hundred twenty-three thousand, five hundred sixty-one".