71388670447534 has 16 divisors (see below), whose sum is σ = 117050066582400. Its totient is φ = 32384883931960.

The previous prime is 71388670447511. The next prime is 71388670447543. The reversal of 71388670447534 is 43574407688317.

It is a super-2 number, since 2×71388670447534² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 71388670447534.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3225574984 + ... + 3225597115.

It is an arithmetic number, because the mean of its divisors is an integer number (7315629161400).

Almost surely, 2^{71388670447534} is an apocalyptic number.

71388670447534 is a deficient number, since it is larger than the sum of its proper divisors (45661396134866).

71388670447534 is a wasteful number, since it uses less digits than its factorization.

71388670447534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6451172615.

The product of its (nonzero) digits is 379330560, while the sum is 67.

The spelling of 71388670447534 in words is "seventy-one trillion, three hundred eighty-eight billion, six hundred seventy million, four hundred forty-seven thousand, five hundred thirty-four".