72179161069 has 8 divisors (see below), whose sum is σ = 74166561560. Its totient is φ = 70193687616.

The previous prime is 72179161007. The next prime is 72179161073. The reversal of 72179161069 is 96016197127.

It can be written as a sum of positive squares in 4 ways, for example, as 42539062500 + 29640098569 = 206250^2 + 172163^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72179161069 - 2⁷ = 72179160941 is a prime.

It is a super-2 number, since 2×72179161069² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72179168069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 405654 + ... + 555799.

It is an arithmetic number, because the mean of its divisors is an integer number (9270820195).

Almost surely, 2^72179161069 is an apocalyptic number.

It is an amenable number.

72179161069 is a deficient number, since it is larger than the sum of its proper divisors (1987400491).

72179161069 is a wasteful number, since it uses less digits than its factorization.

72179161069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 963519.

The product of its (nonzero) digits is 285768, while the sum is 49.

The spelling of 72179161069 in words is "seventy-two billion, one hundred seventy-nine million, one hundred sixty-one thousand, sixty-nine".