71347766251 has 4 divisors (see below), whose sum is σ = 71349286104. Its totient is φ = 71346246400.

The previous prime is 71347766221. The next prime is 71347766263. The reversal of 71347766251 is 15266774317.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15266774317 = 283 ⋅53946199.

It is a cyclic number.

It is not a de Polignac number, because 71347766251 - 2⁵ = 71347766219 is a prime.

It is a super-3 number, since 3×71347766251³ (a number of 34 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71347766195 and 71347766204.

It is not an unprimeable number, because it can be changed into a prime (71347766201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 687190 + ... + 784171.

It is an arithmetic number, because the mean of its divisors is an integer number (17837321526).

Almost surely, 2^71347766251 is an apocalyptic number.

71347766251 is a deficient number, since it is larger than the sum of its proper divisors (1519853).

71347766251 is a wasteful number, since it uses less digits than its factorization.

71347766251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1519852.

The product of its digits is 1481760, while the sum is 49.

The spelling of 71347766251 in words is "seventy-one billion, three hundred forty-seven million, seven hundred sixty-six thousand, two hundred fifty-one".