72530771405 has 32 divisors (see below), whose sum is σ = 94556947968. Its totient is φ = 53193369600.

The previous prime is 72530771387. The next prime is 72530771419. The reversal of 72530771405 is 50417703527.

It is not a de Polignac number, because 72530771405 - 2⁸ = 72530771149 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2182544 + ... + 2215526.

It is an arithmetic number, because the mean of its divisors is an integer number (2954904624).

Almost surely, 2^72530771405 is an apocalyptic number.

It is an amenable number.

72530771405 is a deficient number, since it is larger than the sum of its proper divisors (22026176563).

72530771405 is a wasteful number, since it uses less digits than its factorization.

72530771405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33677.

The product of its (nonzero) digits is 205800, while the sum is 41.

The spelling of 72530771405 in words is "seventy-two billion, five hundred thirty million, seven hundred seventy-one thousand, four hundred five".