16252740644 has 48 divisors (see below), whose sum is σ = 32767284480. Its totient is φ = 6909494400.

The previous prime is 16252740611. The next prime is 16252740649. The reversal of 16252740644 is 44604725261.

It is a happy number.

It is a super-2 number, since 2×16252740644² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16252740649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3502694 + ... + 3507330.

It is an arithmetic number, because the mean of its divisors is an integer number (682651760).

Almost surely, 2^16252740644 is an apocalyptic number.

16252740644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

16252740644 is an abundant number, since it is smaller than the sum of its proper divisors (16514543836).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16252740644 is a wasteful number, since it uses less digits than its factorization.

16252740644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5628 (or 5626 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 41.

The spelling of 16252740644 in words is "sixteen billion, two hundred fifty-two million, seven hundred forty thousand, six hundred forty-four".