1621325896 has 16 divisors (see below), whose sum is σ = 3082803840. Its totient is φ = 799244880.

The previous prime is 1621325891. The next prime is 1621325897. The reversal of 1621325896 is 6985231261.

It is a super-3 number, since 3×1621325896³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (1621325891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1426656 + ... + 1427791.

It is an arithmetic number, because the mean of its divisors is an integer number (192675240).

Almost surely, 2^1621325896 is an apocalyptic number.

It is an amenable number.

1621325896 is a deficient number, since it is larger than the sum of its proper divisors (1461477944).

1621325896 is a wasteful number, since it uses less digits than its factorization.

1621325896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2854524 (or 2854520 counting only the distinct ones).

The product of its digits is 155520, while the sum is 43.

The square root of 1621325896 is about 40265.6913016528. The cubic root of 1621325896 is about 1174.7806190093.

The spelling of 1621325896 in words is "one billion, six hundred twenty-one million, three hundred twenty-five thousand, eight hundred ninety-six".