71053139388 has 72 divisors (see below), whose sum is σ = 208265981056. Its totient is φ = 18455358240.

The previous prime is 71053139371. The next prime is 71053139389. The reversal of 71053139388 is 88393135017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71053139389) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3485170 + ... + 3505497.

Almost surely, 2^71053139388 is an apocalyptic number.

It is an amenable number.

71053139388 is an abundant number, since it is smaller than the sum of its proper divisors (137212841668).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71053139388 is a wasteful number, since it uses less digits than its factorization.

71053139388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6990703 (or 6990690 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 48.

The spelling of 71053139388 in words is "seventy-one billion, fifty-three million, one hundred thirty-nine thousand, three hundred eighty-eight".