71056745421 has 8 divisors (see below), whose sum is σ = 94759097664. Its totient is φ = 47362778400.

The previous prime is 71056745381. The next prime is 71056745447. The reversal of 71056745421 is 12454765017.

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

It is not a de Polignac number, because 71056745421 - 2²⁵ = 71023190989 is a prime.

It is a super-2 number, since 2×71056745421² (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 (71056740421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2076505 + ... + 2110446.

It is an arithmetic number, because the mean of its divisors is an integer number (11844887208).

Almost surely, 2^71056745421 is an apocalyptic number.

It is an amenable number.

71056745421 is a deficient number, since it is larger than the sum of its proper divisors (23702352243).

71056745421 is a wasteful number, since it uses less digits than its factorization.

71056745421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4192611.

The product of its (nonzero) digits is 235200, while the sum is 42.

The spelling of 71056745421 in words is "seventy-one billion, fifty-six million, seven hundred forty-five thousand, four hundred twenty-one".