71536540 has 24 divisors (see below), whose sum is σ = 154288512. Its totient is φ = 27840960.

The previous prime is 71536523. The next prime is 71536541. The reversal of 71536540 is 4563517.

71536540 = T₃₃₁ + T₃₃₂ + ... + T₇₇₄.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71536541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47596 + ... + 49075.

It is an arithmetic number, because the mean of its divisors is an integer number (6428688).

Almost surely, 2^71536540 is an apocalyptic number.

It is an amenable number.

71536540 is an abundant number, since it is smaller than the sum of its proper divisors (82751972).

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

71536540 is a wasteful number, since it uses less digits than its factorization.

71536540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96717 (or 96715 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 71536540 is about 8457.9276421592. The cubic root of 71536540 is about 415.1222168707.

The spelling of 71536540 in words is "seventy-one million, five hundred thirty-six thousand, five hundred forty".