79171695140 has 12 divisors (see below), whose sum is σ = 166260559836. Its totient is φ = 31668678048.

The previous prime is 79171695131. The next prime is 79171695149. The reversal of 79171695140 is 4159617197.

It is an interprime number because it is at equal distance from previous prime (79171695131) and next prime (79171695149).

It can be written as a sum of positive squares in 2 ways, for example, as 23812193344 + 55359501796 = 154312^2 + 235286^2 .

It is a super-2 number, since 2×79171695140² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (79171695149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1979292359 + ... + 1979292398.

It is an arithmetic number, because the mean of its divisors is an integer number (13855046653).

Almost surely, 2^79171695140 is an apocalyptic number.

It is an amenable number.

79171695140 is an abundant number, since it is smaller than the sum of its proper divisors (87088864696).

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

79171695140 is a wasteful number, since it uses less digits than its factorization.

79171695140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3958584766 (or 3958584764 counting only the distinct ones).

The product of its (nonzero) digits is 476280, while the sum is 50.

The spelling of 79171695140 in words is "seventy-nine billion, one hundred seventy-one million, six hundred ninety-five thousand, one hundred forty".