71028257810 has 8 divisors (see below), whose sum is σ = 127850864076. Its totient is φ = 28411303120.

The previous prime is 71028257779. The next prime is 71028257831. The reversal of 71028257810 is 1875282017.

It can be written as a sum of positive squares in 2 ways, for example, as 61851192601 + 9177065209 = 248699^2 + 95797^2 .

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

It is a super-2 number, since 2×71028257810² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3551412881 + ... + 3551412900.

Almost surely, 2^71028257810 is an apocalyptic number.

71028257810 is a deficient number, since it is larger than the sum of its proper divisors (56822606266).

71028257810 is a wasteful number, since it uses less digits than its factorization.

71028257810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7102825788.

The product of its (nonzero) digits is 62720, while the sum is 41.

The spelling of 71028257810 in words is "seventy-one billion, twenty-eight million, two hundred fifty-seven thousand, eight hundred ten".