72186873555 has 16 divisors (see below), whose sum is σ = 116558624160. Its totient is φ = 38146457088.

The previous prime is 72186873553. The next prime is 72186873587. The reversal of 72186873555 is 55537868127.

It is not a de Polignac number, because 72186873555 - 2¹ = 72186873553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72186873495 and 72186873504.

It is not an unprimeable number, because it can be changed into a prime (72186873553) 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, 22073862 + ... + 22077131.

It is an arithmetic number, because the mean of its divisors is an integer number (7284914010).

Almost surely, 2^72186873555 is an apocalyptic number.

72186873555 is a deficient number, since it is larger than the sum of its proper divisors (44371750605).

72186873555 is a wasteful number, since it uses less digits than its factorization.

72186873555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44151110.

The product of its digits is 14112000, while the sum is 57.

The spelling of 72186873555 in words is "seventy-two billion, one hundred eighty-six million, eight hundred seventy-three thousand, five hundred fifty-five".