79970881645125 has 144 divisors (see below), whose sum is σ = 149832212727600. Its totient is φ = 42612865689600.

The previous prime is 79970881645121. The next prime is 79970881645141. The reversal of 79970881645125 is 52154618807997.

It is a happy number.

79970881645125 is a `hidden beast` number, since 7 + 9 + 9 + 70 + 8 + 81 + 6 + 451 + 25 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 52354616451201 + 27616265193924 = 7235649^2 + 5255118^2 .

It is not a de Polignac number, because 79970881645125 - 2² = 79970881645121 is a prime.

It is a super-2 number, since 2×79970881645125² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79970881645121) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 925877941 + ... + 925964309.

It is an arithmetic number, because the mean of its divisors is an integer number (1040501477275).

Almost surely, 2^{79970881645125} is an apocalyptic number.

79970881645125 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

79970881645125 is a deficient number, since it is larger than the sum of its proper divisors (69861331082475).

79970881645125 is an frugal number, since it uses more digits than its factorization.

79970881645125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87537 (or 87506 counting only the distinct ones).

The product of its (nonzero) digits is 304819200, while the sum is 72.

The spelling of 79970881645125 in words is "seventy-nine trillion, nine hundred seventy billion, eight hundred eighty-one million, six hundred forty-five thousand, one hundred twenty-five".