72715065123 has 16 divisors (see below), whose sum is σ = 97772400000.
Its totient is φ = 48067818240.
The previous prime is 72715065121. The next prime is 72715065139. The reversal of 72715065123 is 32156051727.
It is a happy number.
It is not a de Polignac number, because 72715065123 - 21 = 72715065121 is a prime.
It is not an unprimeable number, because it can be changed into a prime (72715065121) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 416788 + ... + 564926.
It is an arithmetic number, because the mean of its divisors is an integer number (6110775000).
Almost surely, 272715065123 is an apocalyptic number.
72715065123 is a deficient number, since it is larger than the sum of its proper divisors (25057334877).
72715065123 is a wasteful number, since it uses less digits than its factorization.
72715065123 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 149522.
The product of its (nonzero) digits is 88200, while the sum is 39.
The spelling of 72715065123 in words is "seventy-two billion, seven hundred fifteen million, sixty-five thousand, one hundred twenty-three".