71815315672 has 16 divisors (see below), whose sum is σ = 134702422560. Its totient is φ = 35894669664.

The previous prime is 71815315657. The next prime is 71815315673. The reversal of 71815315672 is 27651351817.

It is a super-3 number, since 3×71815315672³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71815315673) 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, 1600003 + ... + 1644274.

It is an arithmetic number, because the mean of its divisors is an integer number (8418901410).

Almost surely, 2^71815315672 is an apocalyptic number.

It is an amenable number.

71815315672 is a deficient number, since it is larger than the sum of its proper divisors (62887106888).

71815315672 is a wasteful number, since it uses less digits than its factorization.

71815315672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3247050 (or 3247046 counting only the distinct ones).

The product of its digits is 352800, while the sum is 46.

The spelling of 71815315672 in words is "seventy-one billion, eight hundred fifteen million, three hundred fifteen thousand, six hundred seventy-two".