71200078731 has 16 divisors (see below), whose sum is σ = 110067755520. Its totient is φ = 45402948360.

The previous prime is 71200078717. The next prime is 71200078739. The reversal of 71200078731 is 13787000217.

It is a happy number.

It is not a de Polignac number, because 71200078731 - 2⁵ = 71200078699 is a prime.

It is a super-2 number, since 2×71200078731² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71200078739) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57326335 + ... + 57327576.

It is an arithmetic number, because the mean of its divisors is an integer number (6879234720).

Almost surely, 2^71200078731 is an apocalyptic number.

71200078731 is a deficient number, since it is larger than the sum of its proper divisors (38867676789).

71200078731 is a wasteful number, since it uses less digits than its factorization.

71200078731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114653943 (or 114653937 counting only the distinct ones).

The product of its (nonzero) digits is 16464, while the sum is 36.

Adding to 71200078731 its reverse (13787000217), we get a palindrome (84987078948).

The spelling of 71200078731 in words is "seventy-one billion, two hundred million, seventy-eight thousand, seven hundred thirty-one".