72040720405 has 8 divisors (see below), whose sum is σ = 90207510912. Its totient is φ = 55126812048.

The previous prime is 72040720373. The next prime is 72040720439. The reversal of 72040720405 is 50402704027.

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 72040720405 - 2⁵ = 72040720373 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 313220409 + ... + 313220638.

It is an arithmetic number, because the mean of its divisors is an integer number (11275938864).

Almost surely, 2^72040720405 is an apocalyptic number.

It is an amenable number.

72040720405 is a deficient number, since it is larger than the sum of its proper divisors (18166790507).

72040720405 is a wasteful number, since it uses less digits than its factorization.

72040720405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626441075.

The product of its (nonzero) digits is 15680, while the sum is 31.

The spelling of 72040720405 in words is "seventy-two billion, forty million, seven hundred twenty thousand, four hundred five".