61672795129 has 8 divisors (see below), whose sum is σ = 67352633280. Its totient is φ = 56005160400.

The previous prime is 61672795111. The next prime is 61672795133. The reversal of 61672795129 is 92159727616.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61672795129 - 2¹¹ = 61672793081 is a prime.

It is a super-2 number, since 2×61672795129² (a number of 22 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 61672795129.

It is not an unprimeable number, because it can be changed into a prime (61672795159) 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, 3040282 + ... + 3060499.

It is an arithmetic number, because the mean of its divisors is an integer number (8419079160).

Almost surely, 2^61672795129 is an apocalyptic number.

It is an amenable number.

61672795129 is a deficient number, since it is larger than the sum of its proper divisors (5679838151).

61672795129 is a wasteful number, since it uses less digits than its factorization.

61672795129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6101711.

The product of its digits is 2857680, while the sum is 55.

The spelling of 61672795129 in words is "sixty-one billion, six hundred seventy-two million, seven hundred ninety-five thousand, one hundred twenty-nine".