172091050078 has 16 divisors (see below), whose sum is σ = 260893036800. Its totient is φ = 85130674200.

The previous prime is 172091050073. The next prime is 172091050127. The reversal of 172091050078 is 870050190271.

It is a self number, because there is not a number n which added to its sum of digits gives 172091050078.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172091050073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 905478 + ... + 1078921.

It is an arithmetic number, because the mean of its divisors is an integer number (16305814800).

Almost surely, 2^172091050078 is an apocalyptic number.

172091050078 is a deficient number, since it is larger than the sum of its proper divisors (88801986722).

172091050078 is a wasteful number, since it uses less digits than its factorization.

172091050078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1984863.

The product of its (nonzero) digits is 35280, while the sum is 40.

The spelling of 172091050078 in words is "one hundred seventy-two billion, ninety-one million, fifty thousand, seventy-eight".