79547245129 has 12 divisors (see below), whose sum is σ = 87490649988. Its totient is φ = 72270667040.

The previous prime is 79547245117. The next prime is 79547245159. The reversal of 79547245129 is 92154274597.

It can be written as a sum of positive squares in 2 ways, for example, as 69376926025 + 10170319104 = 263395^2 + 100848^2 .

It is not a de Polignac number, because 79547245129 - 2²¹ = 79545147977 is a prime.

It is a super-2 number, since 2×79547245129² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 79547245129.

It is not an unprimeable number, because it can be changed into a prime (79547245159) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8614 + ... + 398959.

It is an arithmetic number, because the mean of its divisors is an integer number (7290887499).

Almost surely, 2^79547245129 is an apocalyptic number.

It is an amenable number.

79547245129 is a deficient number, since it is larger than the sum of its proper divisors (7943404859).

79547245129 is a wasteful number, since it uses less digits than its factorization.

79547245129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409208 (or 409197 counting only the distinct ones).

The product of its digits is 6350400, while the sum is 55.

The spelling of 79547245129 in words is "seventy-nine billion, five hundred forty-seven million, two hundred forty-five thousand, one hundred twenty-nine".