72101555601 has 16 divisors (see below), whose sum is σ = 97365139200. Its totient is φ = 47452998528.

The previous prime is 72101555551. The next prime is 72101555633. The reversal of 72101555601 is 10655510127.

It is a happy number.

It is not a de Polignac number, because 72101555601 - 2¹³ = 72101547409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72101555401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2395095 + ... + 2425011.

It is an arithmetic number, because the mean of its divisors is an integer number (6085321200).

Almost surely, 2^72101555601 is an apocalyptic number.

It is an amenable number.

72101555601 is a deficient number, since it is larger than the sum of its proper divisors (25263583599).

72101555601 is a wasteful number, since it uses less digits than its factorization.

72101555601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40168.

The product of its (nonzero) digits is 10500, while the sum is 33.

The spelling of 72101555601 in words is "seventy-two billion, one hundred one million, five hundred fifty-five thousand, six hundred one".