1621130266 has 16 divisors (see below), whose sum is σ = 2824640640. Its totient is φ = 683380080.

The previous prime is 1621130243. The next prime is 1621130279. The reversal of 1621130266 is 6620311261.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 948286 + ... + 949993.

It is an arithmetic number, because the mean of its divisors is an integer number (176540040).

Almost surely, 2^1621130266 is an apocalyptic number.

1621130266 is a deficient number, since it is larger than the sum of its proper divisors (1203510374).

1621130266 is a wasteful number, since it uses less digits than its factorization.

1621130266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1898349.

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

The square root of 1621130266 is about 40263.2619890639. The cubic root of 1621130266 is about 1174.7333672349.

The spelling of 1621130266 in words is "one billion, six hundred twenty-one million, one hundred thirty thousand, two hundred sixty-six".