71507929293 has 6 divisors (see below), whose sum is σ = 103289231214. Its totient is φ = 47671952856.

The previous prime is 71507929291. The next prime is 71507929321. The reversal of 71507929293 is 39292970517.

It can be written as a sum of positive squares in only one way, i.e., 66364457769 + 5143471524 = 257613^2 + 71718^2 .

It is not a de Polignac number, because 71507929293 - 2¹ = 71507929291 is a prime.

It is a super-2 number, since 2×71507929293² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71507929291) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3972662730 + ... + 3972662747.

It is an arithmetic number, because the mean of its divisors is an integer number (17214871869).

Almost surely, 2^71507929293 is an apocalyptic number.

It is an amenable number.

71507929293 is a deficient number, since it is larger than the sum of its proper divisors (31781301921).

71507929293 is a wasteful number, since it uses less digits than its factorization.

71507929293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7945325483 (or 7945325480 counting only the distinct ones).

The product of its (nonzero) digits is 2143260, while the sum is 54.

The spelling of 71507929293 in words is "seventy-one billion, five hundred seven million, nine hundred twenty-nine thousand, two hundred ninety-three".