16640072750 has 32 divisors (see below), whose sum is σ = 35600250816. Its totient is φ = 5705167200.

The previous prime is 16640072741. The next prime is 16640072759. The reversal of 16640072750 is 5727004661.

It is an interprime number because it is at equal distance from previous prime (16640072741) and next prime (16640072759).

It is a super-2 number, since 2×16640072750² (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 (16640072759) 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, 4752557 + ... + 4756056.

It is an arithmetic number, because the mean of its divisors is an integer number (1112507838).

Almost surely, 2^16640072750 is an apocalyptic number.

16640072750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16640072750 is an abundant number, since it is smaller than the sum of its proper divisors (18960178066).

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

16640072750 is an equidigital number, since it uses as much as digits as its factorization.

16640072750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9508637 (or 9508627 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 38.

The spelling of 16640072750 in words is "sixteen billion, six hundred forty million, seventy-two thousand, seven hundred fifty".