16512621947 has 8 divisors (see below), whose sum is σ = 16597812000. Its totient is φ = 16427649024.

The previous prime is 16512621943. The next prime is 16512621967. The reversal of 16512621947 is 74912621561.

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 16512621947 - 2² = 16512621943 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16512621898 and 16512621907.

It is not an unprimeable number, because it can be changed into a prime (16512621943) 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, 99323 + ... + 207099.

It is an arithmetic number, because the mean of its divisors is an integer number (2074726500).

Almost surely, 2^16512621947 is an apocalyptic number.

16512621947 is a deficient number, since it is larger than the sum of its proper divisors (85190053).

16512621947 is a wasteful number, since it uses less digits than its factorization.

16512621947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108565.

The product of its digits is 181440, while the sum is 44.

The spelling of 16512621947 in words is "sixteen billion, five hundred twelve million, six hundred twenty-one thousand, nine hundred forty-seven".