16465661644 has 48 divisors (see below), whose sum is σ = 31851943200. Its totient is φ = 7412622336.

The previous prime is 16465661603. The next prime is 16465661651. The reversal of 16465661644 is 44616656461.

It is a super-2 number, since 2×16465661644² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176647 + ... + 253249.

It is an arithmetic number, because the mean of its divisors is an integer number (663582150).

Almost surely, 2^16465661644 is an apocalyptic number.

It is an amenable number.

16465661644 is a deficient number, since it is larger than the sum of its proper divisors (15386281556).

16465661644 is a wasteful number, since it uses less digits than its factorization.

16465661644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76762 (or 76760 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 49.

The spelling of 16465661644 in words is "sixteen billion, four hundred sixty-five million, six hundred sixty-one thousand, six hundred forty-four".