61672170281 has 8 divisors (see below), whose sum is σ = 66672617280. Its totient is φ = 56847177648.

The previous prime is 61672170277. The next prime is 61672170331. The reversal of 61672170281 is 18207127616.

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 61672170281 - 2² = 61672170277 is a prime.

It is a super-2 number, since 2×61672170281² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61672170271) 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, 43862861 + ... + 43864266.

It is an arithmetic number, because the mean of its divisors is an integer number (8334077160).

Almost surely, 2^61672170281 is an apocalyptic number.

It is an amenable number.

61672170281 is a deficient number, since it is larger than the sum of its proper divisors (5000446999).

61672170281 is a wasteful number, since it uses less digits than its factorization.

61672170281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87727183.

The product of its (nonzero) digits is 56448, while the sum is 41.

Adding to 61672170281 its reverse (18207127616), we get a palindrome (79879297897).

The spelling of 61672170281 in words is "sixty-one billion, six hundred seventy-two million, one hundred seventy thousand, two hundred eighty-one".