72478866805 has 8 divisors (see below), whose sum is σ = 87225289632. Its totient is φ = 57815993808.

The previous prime is 72478866793. The next prime is 72478866821. The reversal of 72478866805 is 50866887427.

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 72478866805 - 2⁵ = 72478866773 is a prime.

It is a super-2 number, since 2×72478866805² (a number of 23 digits) contains 22 as substring.

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, 20885547 + ... + 20889016.

It is an arithmetic number, because the mean of its divisors is an integer number (10903161204).

Almost surely, 2^72478866805 is an apocalyptic number.

It is an amenable number.

72478866805 is a deficient number, since it is larger than the sum of its proper divisors (14746422827).

72478866805 is a wasteful number, since it uses less digits than its factorization.

72478866805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41774915.

The product of its (nonzero) digits is 36126720, while the sum is 61.

The spelling of 72478866805 in words is "seventy-two billion, four hundred seventy-eight million, eight hundred sixty-six thousand, eight hundred five".