61806508870 has 16 divisors (see below), whose sum is σ = 111402272880. Its totient is φ = 24689146464.

The previous prime is 61806508843. The next prime is 61806508901. The reversal of 61806508870 is 7880560816.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4174377 + ... + 4189156.

It is an arithmetic number, because the mean of its divisors is an integer number (6962642055).

Almost surely, 2^61806508870 is an apocalyptic number.

61806508870 is a deficient number, since it is larger than the sum of its proper divisors (49595764010).

61806508870 is a wasteful number, since it uses less digits than its factorization.

61806508870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8364279.

The product of its (nonzero) digits is 645120, while the sum is 49.

The spelling of 61806508870 in words is "sixty-one billion, eight hundred six million, five hundred eight thousand, eight hundred seventy".