611622361 has 9 divisors (see below), whose sum is σ = 711680511. Its totient is φ = 524099352.

The previous prime is 611622359. The next prime is 611622377. The reversal of 611622361 is 163226116.

The square root of 611622361 is 24731.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 500193225 + 111429136 = 22365^2 + 10556^2 .

It is not a de Polignac number, because 611622361 - 2¹ = 611622359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (611622391) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 171351 + ... + 174883.

Almost surely, 2^611622361 is an apocalyptic number.

611622361 is the 24731-st square number.

611622361 is the 12366-th centered octagonal number.

It is an amenable number.

611622361 is a deficient number, since it is larger than the sum of its proper divisors (100058150).

611622361 is an frugal number, since it uses more digits than its factorization.

611622361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7080 (or 3540 counting only the distinct ones).

The product of its digits is 2592, while the sum is 28.

The cubic root of 611622361 is about 848.8438079615.

Adding to 611622361 its reverse (163226116), we get a palindrome (774848477).

The spelling of 611622361 in words is "six hundred eleven million, six hundred twenty-two thousand, three hundred sixty-one".