1621726052 has 24 divisors (see below), whose sum is σ = 2977248960. Its totient is φ = 771871520.

The previous prime is 1621726031. The next prime is 1621726061. The reversal of 1621726052 is 2506271261.

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 7 ways as a sum of consecutive naturals, for example, 90218 + ... + 106689.

It is an arithmetic number, because the mean of its divisors is an integer number (124052040).

Almost surely, 2^1621726052 is an apocalyptic number.

It is an amenable number.

1621726052 is a deficient number, since it is larger than the sum of its proper divisors (1355522908).

1621726052 is a wasteful number, since it uses less digits than its factorization.

1621726052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197011 (or 197009 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 1621726052 is about 40270.6599399613. The cubic root of 1621726052 is about 1174.8772594288.

The spelling of 1621726052 in words is "one billion, six hundred twenty-one million, seven hundred twenty-six thousand, fifty-two".