1644016371464 has 32 divisors (see below), whose sum is σ = 3121674211200. Its totient is φ = 811570743360.

The previous prime is 1644016371463. The next prime is 1644016371469. The reversal of 1644016371464 is 4641736104461.

It is a super-3 number, since 3×1644016371464³ (a number of 38 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1644016371463) 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, 27219779 + ... + 27280109.

It is an arithmetic number, because the mean of its divisors is an integer number (97552319100).

Almost surely, 2^{1644016371464} is an apocalyptic number.

It is an amenable number.

1644016371464 is a deficient number, since it is larger than the sum of its proper divisors (1477657839736).

1644016371464 is a wasteful number, since it uses less digits than its factorization.

1644016371464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103533 (or 103529 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 47.

The spelling of 1644016371464 in words is "one trillion, six hundred forty-four billion, sixteen million, three hundred seventy-one thousand, four hundred sixty-four".