61486819845 has 16 divisors (see below), whose sum is σ = 107322449472. Its totient is φ = 29811791360.

The previous prime is 61486819829. The next prime is 61486819859. The reversal of 61486819845 is 54891868416.

It is a happy number.

It is not a de Polignac number, because 61486819845 - 2⁴ = 61486819829 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 186323532 + ... + 186323861.

It is an arithmetic number, because the mean of its divisors is an integer number (6707653092).

Almost surely, 2^61486819845 is an apocalyptic number.

It is an amenable number.

61486819845 is a deficient number, since it is larger than the sum of its proper divisors (45835629627).

61486819845 is a wasteful number, since it uses less digits than its factorization.

61486819845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372647412.

The product of its digits is 13271040, while the sum is 60.

The spelling of 61486819845 in words is "sixty-one billion, four hundred eighty-six million, eight hundred nineteen thousand, eight hundred forty-five".