71650644 has 48 divisors (see below), whose sum is σ = 182609280. Its totient is φ = 21732480.

The previous prime is 71650637. The next prime is 71650651. The reversal of 71650644 is 44605617.

It is an interprime number because it is at equal distance from previous prime (71650637) and next prime (71650651).

It is a super-2 number, since 2×71650644² = 10267629571229472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7842 + ... + 14310.

It is an arithmetic number, because the mean of its divisors is an integer number (3804360).

Almost surely, 2^71650644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71650644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91304640).

71650644 is an abundant number, since it is smaller than the sum of its proper divisors (110958636).

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

71650644 is a wasteful number, since it uses less digits than its factorization.

71650644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6560 (or 6558 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 71650644 is about 8464.6703420748. The cubic root of 71650644 is about 415.3428124968.

It can be divided in two parts, 716 and 50644, that added together give a triangular number (51360 = T₃₂₀).

The spelling of 71650644 in words is "seventy-one million, six hundred fifty thousand, six hundred forty-four".