78044272605 has 384 divisors, whose sum is σ = 173884838400. Its totient is φ = 32786104320.

The previous prime is 78044272573. The next prime is 78044272627. The reversal of 78044272605 is 50627244087.

It is a happy number.

78044272605 is a `hidden beast` number, since 7 + 80 + 442 + 72 + 60 + 5 = 666.

It is not a de Polignac number, because 78044272605 - 2⁵ = 78044272573 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 1279414275 + ... + 1279414335.

It is an arithmetic number, because the mean of its divisors is an integer number (452825100).

Almost surely, 2^78044272605 is an apocalyptic number.

It is an amenable number.

78044272605 is an abundant number, since it is smaller than the sum of its proper divisors (95840565795).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78044272605 is a wasteful number, since it uses less digits than its factorization.

78044272605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222 (or 155 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 45.

The spelling of 78044272605 in words is "seventy-eight billion, forty-four million, two hundred seventy-two thousand, six hundred five".