71561763 has 96 divisors (see below), whose sum is σ = 138378240. Its totient is φ = 34594560.

The previous prime is 71561753. The next prime is 71561773. The reversal of 71561763 is 36716517.

It is an interprime number because it is at equal distance from previous prime (71561753) and next prime (71561773).

It is not a de Polignac number, because 71561763 - 2⁴ = 71561747 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71561753) 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, 546208 + ... + 546338.

It is an arithmetic number, because the mean of its divisors is an integer number (1441440).

Almost surely, 2^71561763 is an apocalyptic number.

71561763 is a deficient number, since it is larger than the sum of its proper divisors (66816477).

71561763 is a wasteful number, since it uses less digits than its factorization.

71561763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209 (or 206 counting only the distinct ones).

The product of its digits is 26460, while the sum is 36.

The square root of 71561763 is about 8459.4185970432. The cubic root of 71561763 is about 415.1710003190.

The spelling of 71561763 in words is "seventy-one million, five hundred sixty-one thousand, seven hundred sixty-three".