71621650 has 24 divisors (see below), whose sum is σ = 134277120. Its totient is φ = 28420560.

The previous prime is 71621633. The next prime is 71621657. The reversal of 71621650 is 5612617.

It is not an unprimeable number, because it can be changed into a prime (71621657) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 711 + ... + 11989.

It is an arithmetic number, because the mean of its divisors is an integer number (5594880).

Almost surely, 2^71621650 is an apocalyptic number.

71621650 is a deficient number, since it is larger than the sum of its proper divisors (62655470).

71621650 is a wasteful number, since it uses less digits than its factorization.

71621650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11418 (or 11413 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 71621650 is about 8462.9575208670. The cubic root of 71621650 is about 415.2867810199.

It can be divided in two parts, 716 and 21650, that added together give a triangular number (22366 = T₂₁₁).

The spelling of 71621650 in words is "seventy-one million, six hundred twenty-one thousand, six hundred fifty".