71249537365 has 8 divisors (see below), whose sum is σ = 85501279800. Its totient is φ = 56998406592.

The previous prime is 71249537351. The next prime is 71249537423. The reversal of 71249537365 is 56373594217.

It can be written as a sum of positive squares in 4 ways, for example, as 21677850756 + 49571686609 = 147234^2 + 222647^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71249537365 - 2¹³ = 71249529173 is a prime.

It is a super-2 number, since 2×71249537365² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162507 + ... + 410983.

It is an arithmetic number, because the mean of its divisors is an integer number (10687659975).

Almost surely, 2^71249537365 is an apocalyptic number.

It is an amenable number.

71249537365 is a deficient number, since it is larger than the sum of its proper divisors (14251742435).

71249537365 is a wasteful number, since it uses less digits than its factorization.

71249537365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305831.

The product of its digits is 4762800, while the sum is 52.

The spelling of 71249537365 in words is "seventy-one billion, two hundred forty-nine million, five hundred thirty-seven thousand, three hundred sixty-five".