72655990134 has 32 divisors (see below), whose sum is σ = 178845515520. Its totient is φ = 19162019232.

The previous prime is 72655990123. The next prime is 72655990163. The reversal of 72655990134 is 43109955627.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 66534244 + ... + 66535335.

It is an arithmetic number, because the mean of its divisors is an integer number (5588922360).

Almost surely, 2^72655990134 is an apocalyptic number.

72655990134 is an abundant number, since it is smaller than the sum of its proper divisors (106189525386).

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

72655990134 is a wasteful number, since it uses less digits than its factorization.

72655990134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133069604.

The product of its (nonzero) digits is 2041200, while the sum is 51.

The spelling of 72655990134 in words is "seventy-two billion, six hundred fifty-five million, nine hundred ninety thousand, one hundred thirty-four".