1621361163 has 16 divisors (see below), whose sum is σ = 2245262336. Its totient is φ = 1039612320.

The previous prime is 1621361153. The next prime is 1621361167. The reversal of 1621361163 is 3611631261.

It is not a de Polignac number, because 1621361163 - 2⁶ = 1621361099 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1621361163.

It is not an unprimeable number, because it can be changed into a prime (1621361167) 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, 38320 + ... + 68637.

It is an arithmetic number, because the mean of its divisors is an integer number (140328896).

Almost surely, 2^1621361163 is an apocalyptic number.

1621361163 is a deficient number, since it is larger than the sum of its proper divisors (623901173).

1621361163 is a wasteful number, since it uses less digits than its factorization.

1621361163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107154.

The product of its digits is 3888, while the sum is 30.

The square root of 1621361163 is about 40266.1292279255. The cubic root of 1621361163 is about 1174.7891368707.

The spelling of 1621361163 in words is "one billion, six hundred twenty-one million, three hundred sixty-one thousand, one hundred sixty-three".