1621566122 has 8 divisors (see below), whose sum is σ = 2653471872. Its totient is φ = 737075500.

The previous prime is 1621566119. The next prime is 1621566137. The reversal of 1621566122 is 2216651261.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 36853754 + ... + 36853797.

It is an arithmetic number, because the mean of its divisors is an integer number (331683984).

Almost surely, 2^1621566122 is an apocalyptic number.

1621566122 is a deficient number, since it is larger than the sum of its proper divisors (1031905750).

1621566122 is a wasteful number, since it uses less digits than its factorization.

1621566122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73707564.

The product of its digits is 8640, while the sum is 32.

The square root of 1621566122 is about 40268.6742021636. The cubic root of 1621566122 is about 1174.8386371439.

The spelling of 1621566122 in words is "one billion, six hundred twenty-one million, five hundred sixty-six thousand, one hundred twenty-two".