1620226361 has 16 divisors (see below), whose sum is σ = 1875089664. Its totient is φ = 1386595584.

The previous prime is 1620226339. The next prime is 1620226373. The reversal of 1620226361 is 1636220261.

It is a cyclic number.

It is not a de Polignac number, because 1620226361 - 2⁶ = 1620226297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1620226301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39905 + ... + 69518.

It is an arithmetic number, because the mean of its divisors is an integer number (117193104).

Almost surely, 2^1620226361 is an apocalyptic number.

It is an amenable number.

1620226361 is a deficient number, since it is larger than the sum of its proper divisors (254863303).

1620226361 is a wasteful number, since it uses less digits than its factorization.

1620226361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109520.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 1620226361 is about 40252.0354889042. The cubic root of 1620226361 is about 1174.5149918619.

The spelling of 1620226361 in words is "one billion, six hundred twenty million, two hundred twenty-six thousand, three hundred sixty-one".