71465039820 has 36 divisors (see below), whose sum is σ = 216777288000. Its totient is φ = 19057343904.

The previous prime is 71465039783. The next prime is 71465039837. The reversal of 71465039820 is 2893056417.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 198513820 + ... + 198514179.

It is a 1-persistent number, because it is pandigital, but 2⋅71465039820 = 142930079640 is not.

Almost surely, 2^71465039820 is an apocalyptic number.

It is an amenable number.

71465039820 is an abundant number, since it is smaller than the sum of its proper divisors (145312248180).

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

71465039820 is a wasteful number, since it uses less digits than its factorization.

71465039820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397028014 (or 397028009 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The spelling of 71465039820 in words is "seventy-one billion, four hundred sixty-five million, thirty-nine thousand, eight hundred twenty".