1621109372 has 6 divisors (see below), whose sum is σ = 2836941408. Its totient is φ = 810554684.

The previous prime is 1621109297. The next prime is 1621109387. The reversal of 1621109372 is 2739011261.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202638668 + ... + 202638675.

It is an arithmetic number, because the mean of its divisors is an integer number (472823568).

Almost surely, 2^1621109372 is an apocalyptic number.

It is an amenable number.

1621109372 is a deficient number, since it is larger than the sum of its proper divisors (1215832036).

1621109372 is a wasteful number, since it uses less digits than its factorization.

1621109372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405277347 (or 405277345 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 1621109372 is about 40263.0025209248. The cubic root of 1621109372 is about 1174.7283203478.

The spelling of 1621109372 in words is "one billion, six hundred twenty-one million, one hundred nine thousand, three hundred seventy-two".