71529770740 has 24 divisors (see below), whose sum is σ = 150219586440. Its totient is φ = 28610562048.

The previous prime is 71529770717. The next prime is 71529770743. The reversal of 71529770740 is 4707792517.

It can be written as a sum of positive squares in 4 ways, for example, as 29240316004 + 42289454736 = 170998^2 + 205644^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71529770743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 427396 + ... + 570724.

It is an arithmetic number, because the mean of its divisors is an integer number (6259149435).

Almost surely, 2^71529770740 is an apocalyptic number.

It is an amenable number.

71529770740 is an abundant number, since it is smaller than the sum of its proper divisors (78689815700).

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

71529770740 is a wasteful number, since it uses less digits than its factorization.

71529770740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168291 (or 168289 counting only the distinct ones).

The product of its (nonzero) digits is 864360, while the sum is 49.

The spelling of 71529770740 in words is "seventy-one billion, five hundred twenty-nine million, seven hundred seventy thousand, seven hundred forty".