72478715511 has 32 divisors (see below), whose sum is σ = 103409768448. Its totient is φ = 45071233920.

The previous prime is 72478715473. The next prime is 72478715563. The reversal of 72478715511 is 11551787427.

It is not a de Polignac number, because 72478715511 - 2¹⁵ = 72478682743 is a prime.

It is a super-2 number, since 2×72478715511² (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 (72478715011) 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 31 ways as a sum of consecutive naturals, for example, 269761 + ... + 466613.

It is an arithmetic number, because the mean of its divisors is an integer number (3231555264).

Almost surely, 2^72478715511 is an apocalyptic number.

72478715511 is a deficient number, since it is larger than the sum of its proper divisors (30931052937).

72478715511 is a wasteful number, since it uses less digits than its factorization.

72478715511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197031.

The product of its digits is 548800, while the sum is 48.

The spelling of 72478715511 in words is "seventy-two billion, four hundred seventy-eight million, seven hundred fifteen thousand, five hundred eleven".