72511438695871 has 32 divisors (see below), whose sum is σ = 88449036480000. Its totient is φ = 58065524479872.

The previous prime is 72511438695851. The next prime is 72511438695907. The reversal of 72511438695871 is 17859683411527.

It is not a de Polignac number, because 72511438695871 - 2¹¹ = 72511438693823 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72511438695797 and 72511438695806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72511438695811) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10407496 + ... + 15916621.

It is an arithmetic number, because the mean of its divisors is an integer number (2764032390000).

Almost surely, 2^{72511438695871} is an apocalyptic number.

72511438695871 is a deficient number, since it is larger than the sum of its proper divisors (15937597784129).

72511438695871 is a wasteful number, since it uses less digits than its factorization.

72511438695871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26324431.

The product of its digits is 101606400, while the sum is 67.

The spelling of 72511438695871 in words is "seventy-two trillion, five hundred eleven billion, four hundred thirty-eight million, six hundred ninety-five thousand, eight hundred seventy-one".