72040555671 has 16 divisors (see below), whose sum is σ = 111279869184. Its totient is φ = 40602112704.

The previous prime is 72040555669. The next prime is 72040555693. The reversal of 72040555671 is 17655504027.

It is a happy number.

It is not a de Polignac number, because 72040555671 - 2¹ = 72040555669 is a prime.

It is a super-2 number, since 2×72040555671² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72040555271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23495061 + ... + 23498126.

It is an arithmetic number, because the mean of its divisors is an integer number (6954991824).

Almost surely, 2^72040555671 is an apocalyptic number.

72040555671 is a deficient number, since it is larger than the sum of its proper divisors (39239313513).

72040555671 is a wasteful number, since it uses less digits than its factorization.

72040555671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46993270.

The product of its (nonzero) digits is 294000, while the sum is 42.

The spelling of 72040555671 in words is "seventy-two billion, forty million, five hundred fifty-five thousand, six hundred seventy-one".