71506391294 has 16 divisors (see below), whose sum is σ = 116353471248. Its totient is φ = 32762050752.

The previous prime is 71506391293. The next prime is 71506391329. The reversal of 71506391294 is 49219360517.

It is a super-2 number, since 2×71506391294² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71506391293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10033832 + ... + 10040955.

It is an arithmetic number, because the mean of its divisors is an integer number (7272091953).

Almost surely, 2^71506391294 is an apocalyptic number.

71506391294 is a deficient number, since it is larger than the sum of its proper divisors (44847079954).

71506391294 is a wasteful number, since it uses less digits than its factorization.

71506391294 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20074939.

The product of its (nonzero) digits is 408240, while the sum is 47.

The spelling of 71506391294 in words is "seventy-one billion, five hundred six million, three hundred ninety-one thousand, two hundred ninety-four".