71149650 has 192 divisors, whose sum is σ = 215986176. Its totient is φ = 15264000.

The previous prime is 71149633. The next prime is 71149657. The reversal of 71149650 is 5694117.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71149657) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 664897 + ... + 665003.

It is an arithmetic number, because the mean of its divisors is an integer number (1124928).

Almost surely, 2^71149650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71149650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107993088).

71149650 is an abundant number, since it is smaller than the sum of its proper divisors (144836526).

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

71149650 is a wasteful number, since it uses less digits than its factorization.

71149650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177 (or 172 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 71149650 is about 8435.0251926121. The cubic root of 71149650 is about 414.3724972492.

The spelling of 71149650 in words is "seventy-one million, one hundred forty-nine thousand, six hundred fifty".