72744178270 has 64 divisors (see below), whose sum is σ = 140013147456. Its totient is φ = 27115683840.

The previous prime is 72744178267. The next prime is 72744178279. The reversal of 72744178270 is 7287144727.

It is a happy number.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72744178279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34135105 + ... + 34137235.

It is an arithmetic number, because the mean of its divisors is an integer number (2187705429).

Almost surely, 2^72744178270 is an apocalyptic number.

72744178270 is a deficient number, since it is larger than the sum of its proper divisors (67268969186).

72744178270 is a wasteful number, since it uses less digits than its factorization.

72744178270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4045.

The product of its (nonzero) digits is 1229312, while the sum is 49.

The spelling of 72744178270 in words is "seventy-two billion, seven hundred forty-four million, one hundred seventy-eight thousand, two hundred seventy".