61210708989 has 8 divisors (see below), whose sum is σ = 82455663360. Its totient is φ = 40386446976.

The previous prime is 61210708973. The next prime is 61210709003. The reversal of 61210708989 is 98980701216.

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

It is not a de Polignac number, because 61210708989 - 2⁴ = 61210708973 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61210700989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105172749 + ... + 105173330.

It is an arithmetic number, because the mean of its divisors is an integer number (10306957920).

Almost surely, 2^61210708989 is an apocalyptic number.

It is an amenable number.

61210708989 is a deficient number, since it is larger than the sum of its proper divisors (21244954371).

61210708989 is a wasteful number, since it uses less digits than its factorization.

61210708989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210346179.

The product of its (nonzero) digits is 435456, while the sum is 51.

The spelling of 61210708989 in words is "sixty-one billion, two hundred ten million, seven hundred eight thousand, nine hundred eighty-nine".