1621363052 has 24 divisors (see below), whose sum is σ = 2858548560. Its totient is φ = 804657600.

The previous prime is 1621363033. The next prime is 1621363063. The reversal of 1621363052 is 2503631261.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 315302 + ... + 320402.

It is an arithmetic number, because the mean of its divisors is an integer number (119106190).

Almost surely, 2^1621363052 is an apocalyptic number.

It is an amenable number.

1621363052 is a deficient number, since it is larger than the sum of its proper divisors (1237185508).

1621363052 is a wasteful number, since it uses less digits than its factorization.

1621363052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5681 (or 5679 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 1621363052 is about 40266.1526843576. The cubic root of 1621363052 is about 1174.7895931079.

Subtracting 1621363052 from its reverse (2503631261), we obtain a square (882268209 = 29703²).

The spelling of 1621363052 in words is "one billion, six hundred twenty-one million, three hundred sixty-three thousand, fifty-two".