71054021613 has 4 divisors (see below), whose sum is σ = 94738695488. Its totient is φ = 47369347740.

The previous prime is 71054021587. The next prime is 71054021641. The reversal of 71054021613 is 31612045017.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 71054021613 - 2¹⁴ = 71054005229 is a prime.

It is a super-2 number, since 2×71054021613² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71054023613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11842336933 + ... + 11842336938.

It is an arithmetic number, because the mean of its divisors is an integer number (23684673872).

Almost surely, 2^71054021613 is an apocalyptic number.

It is an amenable number.

71054021613 is a deficient number, since it is larger than the sum of its proper divisors (23684673875).

71054021613 is a wasteful number, since it uses less digits than its factorization.

71054021613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23684673874.

The product of its (nonzero) digits is 5040, while the sum is 30.

The spelling of 71054021613 in words is "seventy-one billion, fifty-four million, twenty-one thousand, six hundred thirteen".