16315606621 has 8 divisors (see below), whose sum is σ = 17118015488. Its totient is φ = 15530454000.

The previous prime is 16315606609. The next prime is 16315606663. The reversal of 16315606621 is 12660651361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16315606621 - 2⁵ = 16315606589 is a prime.

It is a super-2 number, since 2×16315606621² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16315606121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4312125 + ... + 4315906.

It is an arithmetic number, because the mean of its divisors is an integer number (2139751936).

Almost surely, 2^16315606621 is an apocalyptic number.

It is an amenable number.

16315606621 is a deficient number, since it is larger than the sum of its proper divisors (802408867).

16315606621 is an equidigital number, since it uses as much as digits as its factorization.

16315606621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8628123.

The product of its (nonzero) digits is 38880, while the sum is 37.

The spelling of 16315606621 in words is "sixteen billion, three hundred fifteen million, six hundred six thousand, six hundred twenty-one".